A001009 - OEIS

The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.

The OEIS is supported by the many generous donors to the OEIS Foundation.

A001009 as a triangular array

1

1 1

1 1 1

1 3 4 4

1 11 46 56 56

1 53 1064 6552 9408 9408

1 309 35792 1293216 11270400 16942080 16942080

1 2119 1673792 420909504 27206658048 335390189568 535281401856 535281401856

1 16687 103443808

A001009 as a square array

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
`1`	`1`	`3`	`11`	`53`	`309`	`2119`	`16687`
`1`	`4`	`46`	`1064`	`35792`	`1673792`	`103443808`
`4`	`56`	`6552`	`1293216`	`420909504`
`56`	`9408`	`11270400`	`27206658048`
`9408`	`16942080`	`335390189568`
`16942080`	`535281401856`
`535281401856`

A001009 as an upper right triangle

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
	`1`	`1`	`3`	`11`	`53`	`309`	`2119`	`16687`
		`1`	`4`	`46`	`1064`	`35792`	`1673792`	`103443808`
			`4`	`56`	`6552`	`1293216`	`420909504`
				`56`	`9408`	`11270400`	`27206658048`
					`9408`	`16942080`	`335390189568`
						`16942080`	`535281401856`
							`535281401856`

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 13 05:55 EDT 2024. Contains 372498 sequences. (Running on oeis4.)