A222944 - OEIS

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A222944 as a triangular array

									1
								2		2
							3		7		3
						7		33		33		7
					20		273		420		273		20
				66		2433		5880		5880		2433		66
			238		21873		82320		130680		82320		21873		238
		902		196833		1152480		2883000		2883000		1152480		196833		902
	3510		1771473		16134720		63772920		100692120		63772920

A222944 as a square array

1	2	3	7	20	66	238	902	3510
2	7	33	273	2433	21873	196833	1771473
3	33	420	5880	82320	1152480	16134720
7	273	5880	130680	2883000	63772920
20	2433	82320	2883000	100692120
66	21873	1152480	63772920
238	196833
902

A222944 as an upper right triangle

1	2	3	7	20	66	238	902	3510
	2	7	33	273	2433	21873	196833	1771473
		3	33	420	5880	82320	1152480	16134720
			7	273	5880	130680	2883000	63772920
				20	2433	82320	2883000	100692120
					66	21873	1152480	63772920
						238	196833
							902