A000240 - OEIS

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

A000240 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`0`
`3`		`3`
`4`		`8`
`5`		`45`
`6`		`264`
`7`		`1855`
`8`		`14832`
`9`		`133497`
`10`		`1334960`
`11`		`14684571`
`12`		`176214840`
`13`		`2290792933`
`14`		`32071101048`
`15`		`481066515735`
`16`		`7697064251744`
`17`		`130850092279665`
`18`		`2355301661033952`
`19`		`44750731559645107`
`20`		`895014631192902120`
`21`		`18795307255050944541`
`22`		`413496759611120779880`

[1,0,3,8,45,264,1855,14832,133497,1334960, 14684571,176214840,2290792933,32071101048, 481066515735,7697064251744,130850092279665, 2355301661033952,44750731559645107, 895014631192902120,18795307255050944541, 413496759611120779880]

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 6 06:29 EDT 2024. Contains 372290 sequences. (Running on oeis4.)