A253666 - OEIS

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A253666 as a triangular array

										1
									1		1
								2		4		2
							6		18		18		6
						6		24		36		24		6
					30		150		300		300		150		30
				20		120		300		400		300		120		20
			140		980		2940		4900		4900		2940		980		140
		70		560		1960		3920		4900		3920		1960		560		70
	630		5670		22680		52920		79380		79380		52920		22680		5670		630

A253666 as a square array

1	1	2	6	6	30	20	140	70	630
1	4	18	24	150	120	980	560	5670
2	18	36	300	300	2940	1960	22680
6	24	300	400	4900	3920	52920
6	150	300	4900	4900	79380
30	120	2940	3920	79380
20	980	1960	52920
140	560	22680
70	5670
630

A253666 as an upper right triangle

1	1	2	6	6	30	20	140	70	630
	1	4	18	24	150	120	980	560	5670
		2	18	36	300	300	2940	1960	22680
			6	24	300	400	4900	3920	52920
				6	150	300	4900	4900	79380
					30	120	2940	3920	79380
						20	980	1960	52920
							140	560	22680
								70	5670
									630