A221494 - OEIS

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A221494 as a triangular array

1

1 1

3 5 1

12 28 16 2

55 165 152 47 4

273 1001 1265 658 136 9

1428 6188 9919 7315 2547 392 21

7752 38760 75208 71981 35975 9252 1130 51

43263 245157 558144 657356 431599 159701 32286 3262 127

246675 1562275

A221494 as a square array

`1`	`1`	`3`	`12`	`55`	`273`	`1428`	`7752`	`43263`	`246675`
`1`	`5`	`28`	`165`	`1001`	`6188`	`38760`	`245157`	`1562275`
`1`	`16`	`152`	`1265`	`9919`	`75208`	`558144`
`2`	`47`	`658`	`7315`	`71981`	`657356`
`4`	`136`	`2547`	`35975`	`431599`
`9`	`392`	`9252`	`159701`
`21`	`1130`	`32286`
`51`	`3262`
`127`

A221494 as an upper right triangle

`1`	`1`	`3`	`12`	`55`	`273`	`1428`	`7752`	`43263`	`246675`
	`1`	`5`	`28`	`165`	`1001`	`6188`	`38760`	`245157`	`1562275`
		`1`	`16`	`152`	`1265`	`9919`	`75208`	`558144`
			`2`	`47`	`658`	`7315`	`71981`	`657356`
				`4`	`136`	`2547`	`35975`	`431599`
					`9`	`392`	`9252`	`159701`
						`21`	`1130`	`32286`
							`51`	`3262`
								`127`

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Last modified April 19 03:46 EDT 2024. Contains 371782 sequences. (Running on oeis4.)