A047917 - OEIS

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A047917 as a triangular array

											1
										1		1
									2		0		2
								2		2		0		6
							4		0		0		0		24
						2		6		8		0		0		120
					6		0		0		0		0		0		720
				4		8		0		48		0		0		0		5040
			6		0		36		0		0		0		0		0		40320
		4		20		0		0		384		0		0		0		0		362880
	10		0		0		0		0		0		0		0		0		0		3628800
4		12		64		324		0		3840		0		0		0		0

A047917 as a square array

1	1	2	2	4	2	6	4	6	4	10	4
1	0	2	0	6	0	8	0	20	0	12
2	0	0	8	0	0	36	0	0	64
6	0	0	0	48	0	0	0	324
24	0	0	0	0	384	0	0
120	0	0	0	0	0	3840
720	0	0	0	0	0
5040	0	0	0	0
40320	0	0	0
362880	0	0
3628800

A047917 as an upper right triangle

1	1	2	2	4	2	6	4	6	4	10	4
	1	0	2	0	6	0	8	0	20	0	12
		2	0	0	8	0	0	36	0	0	64
			6	0	0	0	48	0	0	0	324
				24	0	0	0	0	384	0	0
					120	0	0	0	0	0	3840
						720	0	0	0	0	0
							5040	0	0	0	0
								40320	0	0	0
									362880	0	0
										3628800