A221768 - OEIS

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A221768 as a triangular array

											0
										0		0
									0		1		0
								0		3		3		0
							0		8		16		8		0
						0		21		92		92		21		0
					0		55		536		1042		536		55		0
				0		144		3125		12177		12177		3125		144		0
			0		377		18216		141177		296912		141177		18216		377		0
		0		987		106174		1635606		7115200		7115200		1635606		106174		987		0
	0		2584

A221768 as a square array

0	0	0	0	0	0	0	0	0	0	0
0	1	3	8	21	55	144	377	987	2584
0	3	16	92	536	3125	18216	106174
0	8	92	1042	12177	141177	1635606
0	21	536	12177	296912	7115200
0	55	3125	141177	7115200
0	144	18216	1635606
0	377	106174
0	987
0

A221768 as an upper right triangle

0	0	0	0	0	0	0	0	0	0	0
	0	1	3	8	21	55	144	377	987	2584
		0	3	16	92	536	3125	18216	106174
			0	8	92	1042	12177	141177	1635606
				0	21	536	12177	296912	7115200
					0	55	3125	141177	7115200
						0	144	18216	1635606
							0	377	106174
								0	987
									0