A180988 - OEIS

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A180988 as a triangular array

2

1 3

0 4 4

0 3 10 5

0 1 21 20 6

0 0 33 85 35 7

0 0 34 330 260 56 8

0 0 21 1027 2051 666 84 9

0 0 7 2429 14610 9646 1506 120 10

0 0 1 4326 86669 140199 37527 3102 165 11

0 0 0 5848 417934 1820715 1042746 126889

A180988 as a square array

`2`	`1`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`
`3`	`4`	`3`	`1`	`0`	`0`	`0`	`0`	`0`	`0`
`4`	`10`	`21`	`33`	`34`	`21`	`7`	`1`	`0`
`5`	`20`	`85`	`330`	`1027`	`2429`	`4326`	`5848`
`6`	`35`	`260`	`2051`	`14610`	`86669`	`417934`
`7`	`56`	`666`	`9646`	`140199`	`1820715`
`8`	`84`	`1506`	`37527`	`1042746`
`9`	`120`	`3102`	`126889`
`10`	`165`
`11`

A180988 as an upper right triangle

`2`	`1`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`
	`3`	`4`	`3`	`1`	`0`	`0`	`0`	`0`	`0`	`0`
		`4`	`10`	`21`	`33`	`34`	`21`	`7`	`1`	`0`
			`5`	`20`	`85`	`330`	`1027`	`2429`	`4326`	`5848`
				`6`	`35`	`260`	`2051`	`14610`	`86669`	`417934`
					`7`	`56`	`666`	`9646`	`140199`	`1820715`
						`8`	`84`	`1506`	`37527`	`1042746`
							`9`	`120`	`3102`	`126889`
								`10`	`165`
									`11`

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)