A206561 - OEIS

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A206561 as a triangular array

										1
									4		2
								9		5		3
							20		13		7		4
						35		23		15		9		5
					66		47		31		19		11		6
				105		75		53		35		23		13		7
			176		131		93		66		42		27		15		8
		270		203		151		106		74		49		31		17		9
	420		323		241		178		126		86		56		35		19		10
616		477		365		272		200		140		98		63		39		21		11

A206561 as a square array

1	4	9	20	35	66	105	176	270	420	616
2	5	13	23	47	75	131	203	323	477
3	7	15	31	53	93	151	241	365
4	9	19	35	66	106	178	272
5	11	23	42	74	126	200
6	13	27	49	86	140
7	15	31	56	98
8	17	35	63
9	19	39
10	21
11

A206561 as an upper right triangle

1	4	9	20	35	66	105	176	270	420	616
	2	5	13	23	47	75	131	203	323	477
		3	7	15	31	53	93	151	241	365
			4	9	19	35	66	106	178	272
				5	11	23	42	74	126	200
					6	13	27	49	86	140
						7	15	31	56	98
							8	17	35	63
								9	19	39
									10	21
										11

										1
									4		2
								9		5		3
							20		13		7		4
						35		23		15		9		5
					66		47		31		19		11		6
				105		75		53		35		23		13		7
			176		131		93		66		42		27		15		8
		270		203		151		106		74		49		31		17		9
	420		323		241		178		126		86		56		35		19		10
616		477		365		272		200		140		98		63		39		21		11

1	4	9	20	35	66	105	176	270	420	616
2	5	13	23	47	75	131	203	323	477
3	7	15	31	53	93	151	241	365
4	9	19	35	66	106	178	272
5	11	23	42	74	126	200
6	13	27	49	86	140
7	15	31	56	98
8	17	35	63
9	19	39
10	21
11

1	4	9	20	35	66	105	176	270	420	616
	2	5	13	23	47	75	131	203	323	477
		3	7	15	31	53	93	151	241	365
			4	9	19	35	66	106	178	272
				5	11	23	42	74	126	200
					6	13	27	49	86	140
						7	15	31	56	98
							8	17	35	63
								9	19	39
									10	21
										11

										1
									4		2
								9		5		3
							20		13		7		4
						35		23		15		9		5
					66		47		31		19		11		6
				105		75		53		35		23		13		7
			176		131		93		66		42		27		15		8
		270		203		151		106		74		49		31		17		9
	420		323		241		178		126		86		56		35		19		10
616		477		365		272		200		140		98		63		39		21		11

1	4	9	20	35	66	105	176	270	420	616
2	5	13	23	47	75	131	203	323	477
3	7	15	31	53	93	151	241	365
4	9	19	35	66	106	178	272
5	11	23	42	74	126	200
6	13	27	49	86	140
7	15	31	56	98
8	17	35	63
9	19	39
10	21
11

1	4	9	20	35	66	105	176	270	420	616
	2	5	13	23	47	75	131	203	323	477
		3	7	15	31	53	93	151	241	365
			4	9	19	35	66	106	178	272
				5	11	23	42	74	126	200
					6	13	27	49	86	140
						7	15	31	56	98
							8	17	35	63
								9	19	39
									10	21
										11

										1
									4		2
								9		5		3
							20		13		7		4
						35		23		15		9		5
					66		47		31		19		11		6
				105		75		53		35		23		13		7
			176		131		93		66		42		27		15		8
		270		203		151		106		74		49		31		17		9
	420		323		241		178		126		86		56		35		19		10
616		477		365		272		200		140		98		63		39		21		11

1	4	9	20	35	66	105	176	270	420	616
2	5	13	23	47	75	131	203	323	477
3	7	15	31	53	93	151	241	365
4	9	19	35	66	106	178	272
5	11	23	42	74	126	200
6	13	27	49	86	140
7	15	31	56	98
8	17	35	63
9	19	39
10	21
11

1	4	9	20	35	66	105	176	270	420	616
	2	5	13	23	47	75	131	203	323	477
		3	7	15	31	53	93	151	241	365
			4	9	19	35	66	106	178	272
				5	11	23	42	74	126	200
					6	13	27	49	86	140
						7	15	31	56	98
							8	17	35	63
								9	19	39
									10	21
										11