A261718 - OEIS

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A261718 as a triangular array

1

1 0

1 1 0

1 2 2 0

1 3 7 3 0

1 4 15 18 5 0

1 5 26 55 50 7 0

1 6 40 124 216 118 11 0

1 7 57 235 631 729 301 15 0

1 8 77 398 1470 2780 2621 684 22 0

1 9 100 623 2955 8001 12954 8535 1621 30 0

A261718 as a square array

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
`0`	`1`	`2`	`3`	`4`	`5`	`6`	`7`	`8`	`9`
`0`	`2`	`7`	`15`	`26`	`40`	`57`	`77`	`100`
`0`	`3`	`18`	`55`	`124`	`235`	`398`	`623`
`0`	`5`	`50`	`216`	`631`	`1470`	`2955`
`0`	`7`	`118`	`729`	`2780`	`8001`
`0`	`11`	`301`	`2621`	`12954`
`0`	`15`	`684`	`8535`
`0`	`22`	`1621`
`0`	`30`
`0`

A261718 as an upper right triangle

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
	`0`	`1`	`2`	`3`	`4`	`5`	`6`	`7`	`8`	`9`
		`0`	`2`	`7`	`15`	`26`	`40`	`57`	`77`	`100`
			`0`	`3`	`18`	`55`	`124`	`235`	`398`	`623`
				`0`	`5`	`50`	`216`	`631`	`1470`	`2955`
					`0`	`7`	`118`	`729`	`2780`	`8001`
						`0`	`11`	`301`	`2621`	`12954`
							`0`	`15`	`684`	`8535`
								`0`	`22`	`1621`
									`0`	`30`
										`0`

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Last modified April 16 14:17 EDT 2024. Contains 371740 sequences. (Running on oeis4.)