A002840 - OEIS

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A002840 as a simple table

`n`		`a(n)`
`6`		`1`
`7`		`0`
`8`		`1`
`9`		`2`
`10`		`2`
`11`		`4`
`12`		`12`
`13`		`22`
`14`		`58`
`15`		`158`
`16`		`448`
`17`		`1342`
`18`		`4199`
`19`		`13384`
`20`		`43708`
`21`		`144810`
`22`		`485704`
`23`		`1645576`
`24`		`5623571`
`25`		`19358410`
`26`		`67078828`
`27`		`233800162`
`28`		`819267086`
`29`		`2884908430`
`30`		`10204782956`
`31`		`36249143676`
`32`		`129267865144`
`33`		`462669746182`
`34`		`1661652306539`
`35`		`5986979643542`

[1,0,1,2,2,4,12,22,58,158,448,1342,4199,13384, 43708,144810,485704,1645576,5623571,19358410, 67078828,233800162,819267086,2884908430, 10204782956,36249143676,129267865144,462669746182, 1661652306539,5986979643542]

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Last modified April 25 16:23 EDT 2024. Contains 371989 sequences. (Running on oeis4.)