A216694 - OEIS

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A216694 as a triangular array

1

1 1

2 2 2

5 9 9 5

15 90 189 90 15

52 1451 11730 11730 1451 52

203 33694 1561834 6901440 1561834 33694 203

877 1047754 370625430 11239872497 11239872497 370625430 1047754 877

4140 41569451

A216694 as a square array

`1`	`1`	`2`	`5`	`15`	`52`	`203`	`877`	`4140`
`1`	`2`	`9`	`90`	`1451`	`33694`	`1047754`	`41569451`
`2`	`9`	`189`	`11730`	`1561834`	`370625430`
`5`	`90`	`11730`	`6901440`	`11239872497`
`15`	`1451`	`1561834`	`11239872497`
`52`	`33694`	`370625430`
`203`	`1047754`
`877`

A216694 as an upper right triangle

`1`	`1`	`2`	`5`	`15`	`52`	`203`	`877`	`4140`
	`1`	`2`	`9`	`90`	`1451`	`33694`	`1047754`	`41569451`
		`2`	`9`	`189`	`11730`	`1561834`	`370625430`
			`5`	`90`	`11730`	`6901440`	`11239872497`
				`15`	`1451`	`1561834`	`11239872497`
					`52`	`33694`	`370625430`
						`203`	`1047754`
							`877`

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Last modified April 24 19:31 EDT 2024. Contains 371962 sequences. (Running on oeis4.)