A249755 - OEIS

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A249755 as a triangular array

											1
										1		3
									1		7		3
								1		12		10		3
							1		18		22		13		3
						1		25		40		35		16		3
					1		33		65		75		51		19		3
				1		42		98		140		126		70		22		3
			1		52		140		238		266		196		92		25		3
		1		63		192		378		504		462		288		117		28		3
	1		75		255		570		882		966		750		405		145		31

A249755 as a square array

1	1	1	1	1	1	1	1	1	1	1
3	7	12	18	25	33	42	52	63	75
3	10	22	40	65	98	140	192	255
3	13	35	75	140	238	378	570
3	16	51	126	266	504	882
3	19	70	196	462	966
3	22	92	288	750
3	25	117	405
3	28	145
3	31

A249755 as an upper right triangle

1	1	1	1	1	1	1	1	1	1	1
	3	7	12	18	25	33	42	52	63	75
		3	10	22	40	65	98	140	192	255
			3	13	35	75	140	238	378	570
				3	16	51	126	266	504	882
					3	19	70	196	462	966
						3	22	92	288	750
							3	25	117	405
								3	28	145
									3	31