A153190 - OEIS

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A153190 as a triangular array

									1
								2		6
							2		8		48
						2		10		80		880
					2		12		120		1680		30240
				2		14		168		2856		62832		1696464
			2		16		224		4480		116480		3727360		141639680
		2		18		288		6624		198720		7352640		323516160		16499324160
	2		20		360		9360		318240		13366080		668304000

A153190 as a square array

1	2	2	2	2	2	2	2	2
6	8	10	12	14	16	18	20
48	80	120	168	224	288	360
880	1680	2856	4480	6624	9360
30240	62832	116480	198720	318240
1696464	3727360	7352640	13366080
141639680	323516160	668304000
16499324160

A153190 as an upper right triangle

1	2	2	2	2	2	2	2	2
	6	8	10	12	14	16	18	20
		48	80	120	168	224	288	360
			880	1680	2856	4480	6624	9360
				30240	62832	116480	198720	318240
					1696464	3727360	7352640	13366080
						141639680	323516160	668304000
							16499324160