A019538 - OEIS

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A019538 as a triangular array

										1
									1		2
								1		6		6
							1		14		36		24
						1		30		150		240		120
					1		62		540		1560		1800		720
				1		126		1806		8400		16800		15120		5040
			1		254		5796		40824		126000		191520		141120		40320
		1		510		18150		186480		834120		1905120		2328480		1451520		362880
	1		1022		55980		818520		5103000		16435440		29635200		30240000		16329600		3628800

A019538 as a square array

1	1	1	1	1	1	1	1	1	1
2	6	14	30	62	126	254	510	1022
6	36	150	540	1806	5796	18150	55980
24	240	1560	8400	40824	186480	818520
120	1800	16800	126000	834120	5103000
720	15120	191520	1905120	16435440
5040	141120	2328480	29635200
40320	1451520	30240000
362880	16329600
3628800

A019538 as an upper right triangle

1	1	1	1	1	1	1	1	1	1
	2	6	14	30	62	126	254	510	1022
		6	36	150	540	1806	5796	18150	55980
			24	240	1560	8400	40824	186480	818520
				120	1800	16800	126000	834120	5103000
					720	15120	191520	1905120	16435440
						5040	141120	2328480	29635200
							40320	1451520	30240000
								362880	16329600
									3628800