A156996 - OEIS

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A156996 as a triangular array

										1
									-1		2
								0		0		2
							1		0		3		2
						2		8		4		8		2
					13		30		40		20		15		2
				80		192		210		152		60		24		2
			579		1344		1477		994		469		140		35		2
		4738		10800		11672		7888		3660		1232		280		48		2
	43387		97434		104256		70152		32958		11268		2856		504		63		2
439792		976000		1036050		695760		328920		115056		30300		6000		840		80		2

A156996 as a square array

1	-1	0	1	2	13	80	579	4738	43387	439792
2	0	0	8	30	192	1344	10800	97434	976000
2	3	4	40	210	1477	11672	104256	1036050
2	8	20	152	994	7888	70152	695760
2	15	60	469	3660	32958	328920
2	24	140	1232	11268	115056
2	35	280	2856	30300
2	48	504	6000
2	63	840
2	80
2

A156996 as an upper right triangle

1	-1	0	1	2	13	80	579	4738	43387	439792
	2	0	0	8	30	192	1344	10800	97434	976000
		2	3	4	40	210	1477	11672	104256	1036050
			2	8	20	152	994	7888	70152	695760
				2	15	60	469	3660	32958	328920
					2	24	140	1232	11268	115056
						2	35	280	2856	30300
							2	48	504	6000
								2	63	840
									2	80
										2