A180983 - OEIS

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A180983 as a triangular array

1

1 1

0 2 1

0 1 4 1

0 1 6 6 1

0 0 10 20 9 1

0 0 9 71 49 12 1

0 0 6 200 368 109 16 1

0 0 3 450 2403 1502 222 20 1

0 0 1 780 13059 19929 5208 412 25 1

0 0 0 1042 60488 238535 135984 15983 712 30 1

0 0 0 1084

A180983 as a square array

`1`	`1`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`
`1`	`2`	`1`	`1`	`0`	`0`	`0`	`0`	`0`	`0`	`0`
`1`	`4`	`6`	`10`	`9`	`6`	`3`	`1`	`0`	`0`
`1`	`6`	`20`	`71`	`200`	`450`	`780`	`1042`	`1084`
`1`	`9`	`49`	`368`	`2403`	`13059`	`60488`
`1`	`12`	`109`	`1502`	`19929`	`238535`
`1`	`16`	`222`	`5208`	`135984`
`1`	`20`	`412`	`15983`
`1`	`25`	`712`
`1`	`30`
`1`

A180983 as an upper right triangle

`1`	`1`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`
	`1`	`2`	`1`	`1`	`0`	`0`	`0`	`0`	`0`	`0`	`0`
		`1`	`4`	`6`	`10`	`9`	`6`	`3`	`1`	`0`	`0`
			`1`	`6`	`20`	`71`	`200`	`450`	`780`	`1042`	`1084`
				`1`	`9`	`49`	`368`	`2403`	`13059`	`60488`
					`1`	`12`	`109`	`1502`	`19929`	`238535`
						`1`	`16`	`222`	`5208`	`135984`
							`1`	`20`	`412`	`15983`
								`1`	`25`	`712`
									`1`	`30`
										`1`

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Last modified April 16 14:51 EDT 2024. Contains 371749 sequences. (Running on oeis4.)