A101821 - OEIS

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A101821 as a triangular array

2

3 42

4 180 600

5 620 5400 7800

6 1890 36120 126000 100800

7 5534 202860 1428840 2646000 1340640

8 14280 1016400 13053600 46710720 53343360 18627840

9 36792 4702320 103133520 642978000 1380576960

A101821 as a square array

`2`	`3`	`4`	`5`	`6`	`7`	`8`	`9`
`42`	`180`	`620`	`1890`	`5534`	`14280`	`36792`
`600`	`5400`	`36120`	`202860`	`1016400`	`4702320`
`7800`	`126000`	`1428840`	`13053600`	`103133520`
`100800`	`2646000`	`46710720`	`642978000`
`1340640`	`53343360`	`1380576960`
`18627840`

A101821 as an upper right triangle

`2`	`3`	`4`	`5`	`6`	`7`	`8`	`9`
	`42`	`180`	`620`	`1890`	`5534`	`14280`	`36792`
		`600`	`5400`	`36120`	`202860`	`1016400`	`4702320`
			`7800`	`126000`	`1428840`	`13053600`	`103133520`
				`100800`	`2646000`	`46710720`	`642978000`
					`1340640`	`53343360`	`1380576960`
						`18627840`

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Last modified May 5 17:32 EDT 2024. Contains 372277 sequences. (Running on oeis4.)