A221337 - OEIS

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A221337 as a triangular array

0

2 2

0 6 0

4 20 20 4

0 68 0 68 0

8 232 790 790 232 8

0 792 0 10704 0 792 0

16 2704 34042 142792 142792 34042 2704 16

0 9232 0 1937900 0 1937900 0 9232 0

32 31520 1470618 26264018

A221337 as a square array

`0`	`2`	`0`	`4`	`0`	`8`	`0`	`16`	`0`	`32`
`2`	`6`	`20`	`68`	`232`	`792`	`2704`	`9232`	`31520`
`0`	`20`	`0`	`790`	`0`	`34042`	`0`	`1470618`
`4`	`68`	`790`	`10704`	`142792`	`1937900`	`26264018`
`0`	`232`	`0`	`142792`	`0`
`8`	`792`	`34042`	`1937900`
`0`	`2704`	`0`
`16`	`9232`
`0`

A221337 as an upper right triangle

`0`	`2`	`0`	`4`	`0`	`8`	`0`	`16`	`0`	`32`
	`2`	`6`	`20`	`68`	`232`	`792`	`2704`	`9232`	`31520`
		`0`	`20`	`0`	`790`	`0`	`34042`	`0`	`1470618`
			`4`	`68`	`790`	`10704`	`142792`	`1937900`	`26264018`
				`0`	`232`	`0`	`142792`	`0`
					`8`	`792`	`34042`	`1937900`
						`0`	`2704`	`0`
							`16`	`9232`
								`0`

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Last modified April 16 11:08 EDT 2024. Contains 371711 sequences. (Running on oeis4.)