A051715 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A051715 as a triangular array

											1
										2		2
									3		3		6
								4		4		6		1
							5		5		20		30		30
						6		6		15		20		30		1
					7		7		42		35		140		42		42
				8		8		28		84		105		28		42		1
			9		9		72		84		1		105		140		30		30
		10		10		45		120		140		28		105		20		30		1
	11		11		110		495		3960		924		231		165		220		66		66
12		12		66		55		495		264		308		132		165		44		66		1

A051715 as a square array

1	2	3	4	5	6	7	8	9	10	11	12
2	3	4	5	6	7	8	9	10	11	12
6	6	20	15	42	28	72	45	110	66
1	30	20	35	84	84	120	495	55
30	30	140	105	1	140	3960	495
1	42	28	105	28	924	264
42	42	140	105	231	308
1	30	20	165	132
30	30	220	165
1	66	44
66	66
1

A051715 as an upper right triangle

1	2	3	4	5	6	7	8	9	10	11	12
	2	3	4	5	6	7	8	9	10	11	12
		6	6	20	15	42	28	72	45	110	66
			1	30	20	35	84	84	120	495	55
				30	30	140	105	1	140	3960	495
					1	42	28	105	28	924	264
						42	42	140	105	231	308
							1	30	20	165	132
								30	30	220	165
									1	66	44
										66	66
											1