A002215 - OEIS

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

A002215 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`1`
`3`		`2`
`4`		`3`
`5`		`6`
`6`		`10`
`7`		`20`
`8`		`36`
`9`		`72`
`10`		`137`
`11`		`274`
`12`		`543`
`13`		`1086`
`14`		`2219`
`15`		`4438`
`16`		`9285`
`17`		`18570`
`18`		`39587`
`19`		`79174`
`20`		`171369`
`21`		`342738`
`22`		`751236`
`23`		`1502472`
`24`		`3328218`
`25`		`6656436`
`26`		`14878455`
`27`		`29756910`
`28`		`67030785`
`29`		`134061570`
`30`		`304036170`
`31`		`608072340`
`32`		`1387247580`
`33`		`2774495160`

[1,1,2,3,6,10,20,36,72,137,274,543,1086,2219,4438, 9285,18570,39587,79174,171369,342738,751236, 1502472,3328218,6656436,14878455,29756910, 67030785,134061570,304036170,608072340,1387247580, 2774495160]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 19 15:34 EDT 2024. Contains 371794 sequences. (Running on oeis4.)