A221768 - OEIS

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A221768 as a triangular array

0

0 0

0 1 0

0 3 3 0

0 8 16 8 0

0 21 92 92 21 0

0 55 536 1042 536 55 0

0 144 3125 12177 12177 3125 144 0

0 377 18216 141177 296912 141177 18216 377 0

0 987 106174 1635606 7115200 7115200 1635606 106174 987 0

0 2584

A221768 as a square array

`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`
`0`	`1`	`3`	`8`	`21`	`55`	`144`	`377`	`987`	`2584`
`0`	`3`	`16`	`92`	`536`	`3125`	`18216`	`106174`
`0`	`8`	`92`	`1042`	`12177`	`141177`	`1635606`
`0`	`21`	`536`	`12177`	`296912`	`7115200`
`0`	`55`	`3125`	`141177`	`7115200`
`0`	`144`	`18216`	`1635606`
`0`	`377`	`106174`
`0`	`987`
`0`

A221768 as an upper right triangle

`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`
	`0`	`1`	`3`	`8`	`21`	`55`	`144`	`377`	`987`	`2584`
		`0`	`3`	`16`	`92`	`536`	`3125`	`18216`	`106174`
			`0`	`8`	`92`	`1042`	`12177`	`141177`	`1635606`
				`0`	`21`	`536`	`12177`	`296912`	`7115200`
					`0`	`55`	`3125`	`141177`	`7115200`
						`0`	`144`	`18216`	`1635606`
							`0`	`377`	`106174`
								`0`	`987`
									`0`

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Last modified May 2 18:24 EDT 2024. Contains 372203 sequences. (Running on oeis4.)