A026657 - OEIS

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A026657 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`3`
`2`		`8`
`3`		`18`
`4`		`40`
`5`		`84`
`6`		`182`
`7`		`378`
`8`		`814`
`9`		`1686`
`10`		`3626`
`11`		`7506`
`12`		`16138`
`13`		`33402`
`14`		`71810`
`15`		`148626`
`16`		`319522`
`17`		`661314`
`18`		`1421714`
`19`		`2942514`
`20`		`6325906`
`21`		`13092690`
`22`		`28147058`
`23`		`58255794`
`24`		`125240050`
`25`		`259208562`
`26`		`557254322`
`27`		`1153345842`
`28`		`2479497394`

[1,3,8,18,40,84,182,378,814,1686,3626,7506,16138, 33402,71810,148626,319522,661314,1421714,2942514, 6325906,13092690,28147058,58255794,125240050, 259208562,557254322,1153345842,2479497394]

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Last modified April 24 15:57 EDT 2024. Contains 371961 sequences. (Running on oeis4.)