A139526 - OEIS

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A139526 as a triangular array

										1
									1		2
								1		6		9
							1		12		48		64
						1		20		150		500		625
					1		30		360		2160		6480		7776
				1		42		735		6860		36015		100842		117649
			1		56		1344		17920		143360		688128		1835008		2097152
		1		72		2268		40824		459270		3306744		14880348		38263752		43046721
	1		90		3600		84000		1260000		12600000		84000000		360000000		900000000		1000000000

A139526 as a square array

1	1	1	1	1	1	1	1	1	1
2	6	12	20	30	42	56	72	90
9	48	150	360	735	1344	2268	3600
64	500	2160	6860	17920	40824	84000
625	6480	36015	143360	459270	1260000
7776	100842	688128	3306744	12600000
117649	1835008	14880348	84000000
2097152	38263752	360000000
43046721	900000000
1000000000

A139526 as an upper right triangle

1	1	1	1	1	1	1	1	1	1
	2	6	12	20	30	42	56	72	90
		9	48	150	360	735	1344	2268	3600
			64	500	2160	6860	17920	40824	84000
				625	6480	36015	143360	459270	1260000
					7776	100842	688128	3306744	12600000
						117649	1835008	14880348	84000000
							2097152	38263752	360000000
								43046721	900000000
									1000000000