A187783 - OEIS

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A187783 as a triangular array

1

1 1

1 1 1

1 1 2 1

1 1 6 6 1

1 1 20 90 24 1

1 1 70 1680 2520 120 1

1 1 252 34650 369600 113400 720 1

1 1 924 756756 63063000 168168000 7484400 5040 1

A187783 as a square array

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
`1`	`2`	`6`	`20`	`70`	`252`	`924`
`1`	`6`	`90`	`1680`	`34650`	`756756`
`1`	`24`	`2520`	`369600`	`63063000`
`1`	`120`	`113400`	`168168000`
`1`	`720`	`7484400`
`1`	`5040`
`1`

A187783 as an upper right triangle

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
		`1`	`2`	`6`	`20`	`70`	`252`	`924`
			`1`	`6`	`90`	`1680`	`34650`	`756756`
				`1`	`24`	`2520`	`369600`	`63063000`
					`1`	`120`	`113400`	`168168000`
						`1`	`720`	`7484400`
							`1`	`5040`
								`1`

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Last modified May 13 06:21 EDT 2024. Contains 372498 sequences. (Running on oeis4.)