A008305 - OEIS

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A008305 as a triangular array

										1
									1		2
								1		2		6
							1		2		9		24
						1		2		13		44		120
					1		2		20		80		265		720
				1		2		31		144		579		1854		5040
			1		2		49		264		1265		4738		14833		40320
		1		2		78		484		2783		12072		43387		133496		362880
	1		2		125		888		6208		30818		126565		439792		1334961		3628800

A008305 as a square array

1	1	1	1	1	1	1	1	1	1
2	2	2	2	2	2	2	2	2
6	9	13	20	31	49	78	125
24	44	80	144	264	484	888
120	265	579	1265	2783	6208
720	1854	4738	12072	30818
5040	14833	43387	126565
40320	133496	439792
362880	1334961
3628800

A008305 as an upper right triangle

1	1	1	1	1	1	1	1	1	1
	2	2	2	2	2	2	2	2	2
		6	9	13	20	31	49	78	125
			24	44	80	144	264	484	888
				120	265	579	1265	2783	6208
					720	1854	4738	12072	30818
						5040	14833	43387	126565
							40320	133496	439792
								362880	1334961
									3628800