A121284 - OEIS

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A121284 as a triangular array

1

1 1

2 2 1

6 6 3 2

30 30 15 10 6

240 240 120 80 48 30

3120 3120 1560 1040 624 390 240

65520 65520 32760 21840 13104 8190 5040 3120

2227680 2227680 1113840 742560 445536 278460 171360 106080 65520

A121284 as a square array

`1`	`1`	`2`	`6`	`30`	`240`	`3120`	`65520`	`2227680`
`1`	`2`	`6`	`30`	`240`	`3120`	`65520`	`2227680`
`1`	`3`	`15`	`120`	`1560`	`32760`	`1113840`
`2`	`10`	`80`	`1040`	`21840`	`742560`
`6`	`48`	`624`	`13104`	`445536`
`30`	`390`	`8190`	`278460`
`240`	`5040`	`171360`
`3120`	`106080`
`65520`

A121284 as an upper right triangle

`1`	`1`	`2`	`6`	`30`	`240`	`3120`	`65520`	`2227680`
	`1`	`2`	`6`	`30`	`240`	`3120`	`65520`	`2227680`
		`1`	`3`	`15`	`120`	`1560`	`32760`	`1113840`
			`2`	`10`	`80`	`1040`	`21840`	`742560`
				`6`	`48`	`624`	`13104`	`445536`
					`30`	`390`	`8190`	`278460`
						`240`	`5040`	`171360`
							`3120`	`106080`
								`65520`

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Last modified April 25 08:27 EDT 2024. Contains 371964 sequences. (Running on oeis4.)