A008826 - OEIS

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A008826 as a triangular array

1

1 3

1 13 18

1 50 205 180

1 201 1865 4245 2700

1 875 16674 74165 114345 56700

1 4138 155477 1208830 3394790 3919860 1587600

1 21145 1542699 19800165 90265560 182184030 167310360 57153600

1 115973 16385857 335976195 2338275240 7342024200 11471572350 8719666200 2571912000

A008826 as a square array

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
`3`	`13`	`50`	`201`	`875`	`4138`	`21145`	`115973`
`18`	`205`	`1865`	`16674`	`155477`	`1542699`	`16385857`
`180`	`4245`	`74165`	`1208830`	`19800165`	`335976195`
`2700`	`114345`	`3394790`	`90265560`	`2338275240`
`56700`	`3919860`	`182184030`	`7342024200`
`1587600`	`167310360`	`11471572350`
`57153600`	`8719666200`
`2571912000`

A008826 as an upper right triangle

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
	`3`	`13`	`50`	`201`	`875`	`4138`	`21145`	`115973`
		`18`	`205`	`1865`	`16674`	`155477`	`1542699`	`16385857`
			`180`	`4245`	`74165`	`1208830`	`19800165`	`335976195`
				`2700`	`114345`	`3394790`	`90265560`	`2338275240`
					`56700`	`3919860`	`182184030`	`7342024200`
						`1587600`	`167310360`	`11471572350`
							`57153600`	`8719666200`
								`2571912000`

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Last modified April 25 16:42 EDT 2024. Contains 371989 sequences. (Running on oeis4.)