A185421 - OEIS

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A185421 as a triangular array

1

1 2

2 6 6

5 22 36 24

16 90 210 240 120

61 422 1260 2040 1800 720

272 2226 8106 16800 21000 15120 5040

1385 13102 56196 141624 226800 231840 141120 40320

7936 85170 420330 1244880 2421720 3175200 2751840 1451520 362880

A185421 as a square array

`1`	`1`	`2`	`5`	`16`	`61`	`272`	`1385`	`7936`
`2`	`6`	`22`	`90`	`422`	`2226`	`13102`	`85170`
`6`	`36`	`210`	`1260`	`8106`	`56196`	`420330`
`24`	`240`	`2040`	`16800`	`141624`	`1244880`
`120`	`1800`	`21000`	`226800`	`2421720`
`720`	`15120`	`231840`	`3175200`
`5040`	`141120`	`2751840`
`40320`	`1451520`
`362880`

A185421 as an upper right triangle

`1`	`1`	`2`	`5`	`16`	`61`	`272`	`1385`	`7936`
	`2`	`6`	`22`	`90`	`422`	`2226`	`13102`	`85170`
		`6`	`36`	`210`	`1260`	`8106`	`56196`	`420330`
			`24`	`240`	`2040`	`16800`	`141624`	`1244880`
				`120`	`1800`	`21000`	`226800`	`2421720`
					`720`	`15120`	`231840`	`3175200`
						`5040`	`141120`	`2751840`
							`40320`	`1451520`
								`362880`

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Last modified April 18 17:42 EDT 2024. Contains 371781 sequences. (Running on oeis4.)