A155997 - OEIS

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A155997 as a triangular array

2

1 1

2 0 2

1 3 3 1

2 0 12 0 2

1 5 10 10 5 1

2 0 30 0 30 0 2

1 7 21 35 35 21 7 1

2 0 56 0 140 0 56 0 2

1 9 36 84 126 126 84 36 9 1

2 0 90 0 420 0 420 0 90 0 2

1 11 55 165 330 462 462 330 165 55 11 1

A155997 as a square array

`2`	`1`	`2`	`1`	`2`	`1`	`2`	`1`	`2`	`1`	`2`	`1`
`1`	`0`	`3`	`0`	`5`	`0`	`7`	`0`	`9`	`0`	`11`
`2`	`3`	`12`	`10`	`30`	`21`	`56`	`36`	`90`	`55`
`1`	`0`	`10`	`0`	`35`	`0`	`84`	`0`	`165`
`2`	`5`	`30`	`35`	`140`	`126`	`420`	`330`
`1`	`0`	`21`	`0`	`126`	`0`	`462`
`2`	`7`	`56`	`84`	`420`	`462`
`1`	`0`	`36`	`0`	`330`
`2`	`9`	`90`	`165`
`1`	`0`	`55`
`2`	`11`
`1`

A155997 as an upper right triangle

`2`	`1`	`2`	`1`	`2`	`1`	`2`	`1`	`2`	`1`	`2`	`1`
	`1`	`0`	`3`	`0`	`5`	`0`	`7`	`0`	`9`	`0`	`11`
		`2`	`3`	`12`	`10`	`30`	`21`	`56`	`36`	`90`	`55`
			`1`	`0`	`10`	`0`	`35`	`0`	`84`	`0`	`165`
				`2`	`5`	`30`	`35`	`140`	`126`	`420`	`330`
					`1`	`0`	`21`	`0`	`126`	`0`	`462`
						`2`	`7`	`56`	`84`	`420`	`462`
							`1`	`0`	`36`	`0`	`330`
								`2`	`9`	`90`	`165`
									`1`	`0`	`55`
										`2`	`11`
											`1`

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Last modified April 19 12:14 EDT 2024. Contains 371792 sequences. (Running on oeis4.)