A027281 - OEIS

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

A027281 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`6`
`2`		`21`
`3`		`76`
`4`		`235`
`5`		`738`
`6`		`2177`
`7`		`6424`
`8`		`18423`
`9`		`52590`
`10`		`147917`
`11`		`413796`
`12`		`1147523`
`13`		`3166842`
`14`		`8689305`
`15`		`23745584`
`16`		`64621199`
`17`		`175277574`
`18`		`473909989`
`19`		`1277864060`
`20`		`3436938267`
`21`		`9223203858`
`22`		`24699503281`
`23`		`66020102472`
`24`		`176160084775`
`25`		`469293598878`

[1,6,21,76,235,738,2177,6424,18423,52590,147917, 413796,1147523,3166842,8689305,23745584,64621199, 175277574,473909989,1277864060,3436938267, 9223203858,24699503281,66020102472,176160084775, 469293598878]

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 20 04:18 EDT 2024. Contains 374441 sequences. (Running on oeis4.)