A101818 - OEIS

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A101818 as a triangular array

1

1 1

1 6 2

1 21 36 6

1 60 300 240 24

1 155 1800 3900 1800 120

1 378 9030 42000 50400 15120 720

1 889 40572 357210 882000 670320 141120 5040

1 2040 169400 2610720 11677680 17781120 9313920 1451520 40320

A101818 as a square array

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
`1`	`6`	`21`	`60`	`155`	`378`	`889`	`2040`
`2`	`36`	`300`	`1800`	`9030`	`40572`	`169400`
`6`	`240`	`3900`	`42000`	`357210`	`2610720`
`24`	`1800`	`50400`	`882000`	`11677680`
`120`	`15120`	`670320`	`17781120`
`720`	`141120`	`9313920`
`5040`	`1451520`
`40320`

A101818 as an upper right triangle

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
	`1`	`6`	`21`	`60`	`155`	`378`	`889`	`2040`
		`2`	`36`	`300`	`1800`	`9030`	`40572`	`169400`
			`6`	`240`	`3900`	`42000`	`357210`	`2610720`
				`24`	`1800`	`50400`	`882000`	`11677680`
					`120`	`15120`	`670320`	`17781120`
						`720`	`141120`	`9313920`
							`5040`	`1451520`
								`40320`

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Last modified April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)