A091187 - OEIS

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A091187 as a triangular array

1

1 1

1 2 2

1 3 6 4

1 4 12 16 9

1 5 20 40 45 21

1 6 30 80 135 126 51

1 7 42 140 315 441 357 127

1 8 56 224 630 1176 1428 1016 323

1 9 72 336 1134 2646 4284 4572 2907 835

1 10 90 480 1890 5292 10710 15240 14535 8350 2188

A091187 as a square array

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
`1`	`2`	`3`	`4`	`5`	`6`	`7`	`8`	`9`	`10`
`2`	`6`	`12`	`20`	`30`	`42`	`56`	`72`	`90`
`4`	`16`	`40`	`80`	`140`	`224`	`336`	`480`
`9`	`45`	`135`	`315`	`630`	`1134`	`1890`
`21`	`126`	`441`	`1176`	`2646`	`5292`
`51`	`357`	`1428`	`4284`	`10710`
`127`	`1016`	`4572`	`15240`
`323`	`2907`	`14535`
`835`	`8350`
`2188`

A091187 as an upper right triangle

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
	`1`	`2`	`3`	`4`	`5`	`6`	`7`	`8`	`9`	`10`
		`2`	`6`	`12`	`20`	`30`	`42`	`56`	`72`	`90`
			`4`	`16`	`40`	`80`	`140`	`224`	`336`	`480`
				`9`	`45`	`135`	`315`	`630`	`1134`	`1890`
					`21`	`126`	`441`	`1176`	`2646`	`5292`
						`51`	`357`	`1428`	`4284`	`10710`
							`127`	`1016`	`4572`	`15240`
								`323`	`2907`	`14535`
									`835`	`8350`
										`2188`

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Last modified April 18 18:58 EDT 2024. Contains 371781 sequences. (Running on oeis4.)