A090981 - OEIS

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A090981 as a triangular array

1

1 1

1 4 1

1 11 9 1

1 26 46 16 1

1 57 180 130 25 1

1 120 603 750 295 36 1

1 247 1827 3507 2345 581 49 1

1 502 5164 14224 14518 6076 1036 64 1

1 1013 13878 52068 75558 48006 13776 1716 81 1

1 2036 35905 176430

A090981 as a square array

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
`1`	`4`	`11`	`26`	`57`	`120`	`247`	`502`	`1013`	`2036`
`1`	`9`	`46`	`180`	`603`	`1827`	`5164`	`13878`	`35905`
`1`	`16`	`130`	`750`	`3507`	`14224`	`52068`	`176430`
`1`	`25`	`295`	`2345`	`14518`	`75558`
`1`	`36`	`581`	`6076`	`48006`
`1`	`49`	`1036`	`13776`
`1`	`64`	`1716`
`1`	`81`
`1`

A090981 as an upper right triangle

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
	`1`	`4`	`11`	`26`	`57`	`120`	`247`	`502`	`1013`	`2036`
		`1`	`9`	`46`	`180`	`603`	`1827`	`5164`	`13878`	`35905`
			`1`	`16`	`130`	`750`	`3507`	`14224`	`52068`	`176430`
				`1`	`25`	`295`	`2345`	`14518`	`75558`
					`1`	`36`	`581`	`6076`	`48006`
						`1`	`49`	`1036`	`13776`
							`1`	`64`	`1716`
								`1`	`81`
									`1`

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Last modified April 19 23:15 EDT 2024. Contains 371798 sequences. (Running on oeis4.)