A221408 - OEIS

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A221408 as a triangular array

0

2 2

0 6 0

4 16 16 4

0 44 0 44 0

8 120 436 436 120 8

0 328 0 4518 0 328 0

16 896 12668 47156 47156 12668 896 16

0 2448 0 492102 0 492102 0 2448 0

32 6688 368268 5133044 18852560 18852560 5133044 368268 6688 32

A221408 as a square array

`0`	`2`	`0`	`4`	`0`	`8`	`0`	`16`	`0`	`32`
`2`	`6`	`16`	`44`	`120`	`328`	`896`	`2448`	`6688`
`0`	`16`	`0`	`436`	`0`	`12668`	`0`	`368268`
`4`	`44`	`436`	`4518`	`47156`	`492102`	`5133044`
`0`	`120`	`0`	`47156`	`0`	`18852560`
`8`	`328`	`12668`	`492102`	`18852560`
`0`	`896`	`0`	`5133044`
`16`	`2448`	`368268`
`0`	`6688`
`32`

A221408 as an upper right triangle

`0`	`2`	`0`	`4`	`0`	`8`	`0`	`16`	`0`	`32`
	`2`	`6`	`16`	`44`	`120`	`328`	`896`	`2448`	`6688`
		`0`	`16`	`0`	`436`	`0`	`12668`	`0`	`368268`
			`4`	`44`	`436`	`4518`	`47156`	`492102`	`5133044`
				`0`	`120`	`0`	`47156`	`0`	`18852560`
					`8`	`328`	`12668`	`492102`	`18852560`
						`0`	`896`	`0`	`5133044`
							`16`	`2448`	`368268`
								`0`	`6688`
									`32`

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Last modified April 19 21:09 EDT 2024. Contains 371798 sequences. (Running on oeis4.)