A264643 - OEIS

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A264643 as a triangular array

									1
								1		1
							1		1		1
						2		8		6		1
					4		55		149		30		2
				8		572		5080		3741		284		4
			24		5928		364544		1185056		199456		2344		8
		72		113808		46305472		715001088		503460352		18120064		31632		16
	216		2536688		6958619648

A264643 as a square array

1	1	1	2	4	8	24	72	216
1	1	8	55	572	5928	113808	2536688
1	6	149	5080	364544	46305472	6958619648
1	30	3741	1185056	715001088
2	284	199456	503460352
4	2344	18120064
8	31632
16

A264643 as an upper right triangle

1	1	1	2	4	8	24	72	216
	1	1	8	55	572	5928	113808	2536688
		1	6	149	5080	364544	46305472	6958619648
			1	30	3741	1185056	715001088
				2	284	199456	503460352
					4	2344	18120064
						8	31632
							16