A171731 - OEIS

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A171731 as a triangular array

0

1 0

1 2 0

2 3 3 0

3 8 6 4 0

5 15 20 10 5 0

8 30 45 40 15 6 0

13 56 105 105 70 21 7 0

21 104 224 280 210 112 28 8 0

34 189 468 672 630 378 168 36 9 0

55 340 945 1560 1680 1260 630 240 45 10 0

A171731 as a square array

`0`	`1`	`1`	`2`	`3`	`5`	`8`	`13`	`21`	`34`	`55`
`0`	`2`	`3`	`8`	`15`	`30`	`56`	`104`	`189`	`340`
`0`	`3`	`6`	`20`	`45`	`105`	`224`	`468`	`945`
`0`	`4`	`10`	`40`	`105`	`280`	`672`	`1560`
`0`	`5`	`15`	`70`	`210`	`630`	`1680`
`0`	`6`	`21`	`112`	`378`	`1260`
`0`	`7`	`28`	`168`	`630`
`0`	`8`	`36`	`240`
`0`	`9`	`45`
`0`	`10`
`0`

A171731 as an upper right triangle

`0`	`1`	`1`	`2`	`3`	`5`	`8`	`13`	`21`	`34`	`55`
	`0`	`2`	`3`	`8`	`15`	`30`	`56`	`104`	`189`	`340`
		`0`	`3`	`6`	`20`	`45`	`105`	`224`	`468`	`945`
			`0`	`4`	`10`	`40`	`105`	`280`	`672`	`1560`
				`0`	`5`	`15`	`70`	`210`	`630`	`1680`
					`0`	`6`	`21`	`112`	`378`	`1260`
						`0`	`7`	`28`	`168`	`630`
							`0`	`8`	`36`	`240`
								`0`	`9`	`45`
									`0`	`10`
										`0`

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Last modified April 23 05:09 EDT 2024. Contains 371906 sequences. (Running on oeis4.)