A172089 - OEIS

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A172089 as a triangular array

1

1 1

1 2 1

2 3 3 2

3 8 6 8 3

8 15 20 20 15 8

15 48 45 80 45 48 15

48 105 168 210 210 168 105 48

105 384 420 896 630 896 420 384 105

384 945 1728 2520 3024 3024 2520 1728 945 384

945 3840 4725 11520 9450 16128 9450 11520 4725 3840 945

A172089 as a square array

`1`	`1`	`1`	`2`	`3`	`8`	`15`	`48`	`105`	`384`	`945`
`1`	`2`	`3`	`8`	`15`	`48`	`105`	`384`	`945`	`3840`
`1`	`3`	`6`	`20`	`45`	`168`	`420`	`1728`	`4725`
`2`	`8`	`20`	`80`	`210`	`896`	`2520`	`11520`
`3`	`15`	`45`	`210`	`630`	`3024`	`9450`
`8`	`48`	`168`	`896`	`3024`	`16128`
`15`	`105`	`420`	`2520`	`9450`
`48`	`384`	`1728`	`11520`
`105`	`945`	`4725`
`384`	`3840`
`945`

A172089 as an upper right triangle

`1`	`1`	`1`	`2`	`3`	`8`	`15`	`48`	`105`	`384`	`945`
	`1`	`2`	`3`	`8`	`15`	`48`	`105`	`384`	`945`	`3840`
		`1`	`3`	`6`	`20`	`45`	`168`	`420`	`1728`	`4725`
			`2`	`8`	`20`	`80`	`210`	`896`	`2520`	`11520`
				`3`	`15`	`45`	`210`	`630`	`3024`	`9450`
					`8`	`48`	`168`	`896`	`3024`	`16128`
						`15`	`105`	`420`	`2520`	`9450`
							`48`	`384`	`1728`	`11520`
								`105`	`945`	`4725`
									`384`	`3840`
										`945`

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Last modified April 17 21:16 EDT 2024. Contains 371767 sequences. (Running on oeis4.)