A012261 - OEIS

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

A012261 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`1`
`3`		`4`
`4`		`13`
`5`		`76`
`6`		`421`
`7`		`3424`
`8`		`26713`
`9`		`277456`
`10`		`2794441`
`11`		`35345344`
`12`		`436186213`
`13`		`6504742336`
`14`		`95033434861`
`15`		`1632531979264`
`16`		`27555582190513`
`17`		`535821754153216`
`18`		`10260037095841681`
`19`		`222769351470429184`
`20`		`4771143086720391613`

[1,1,1,4,13,76,421,3424,26713,277456,2794441, 35345344,436186213,6504742336,95033434861, 1632531979264,27555582190513,535821754153216, 10260037095841681,222769351470429184, 4771143086720391613]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)