A002880 - OEIS

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A002880 as a simple table

`n`		`a(n)`
`6`		`1`
`7`		`0`
`8`		`1`
`9`		`1`
`10`		`2`
`11`		`2`
`12`		`9`
`13`		`11`
`14`		`37`
`15`		`79`
`16`		`249`
`17`		`671`
`18`		`2182`
`19`		`6692`
`20`		`22131`
`21`		`72405`
`22`		`243806`
`23`		`822788`
`24`		`2815119`
`25`		`9679205`
`26`		`33551192`
`27`		`116900081`
`28`		`409675567`
`29`		`1442454215`
`30`		`5102542680`
`31`		`18124571838`
`32`		`64634480340`
`33`		`231334873091`
`34`		`830828150081`
`35`		`2993489821771`

[1,0,1,1,2,2,9,11,37,79,249,671,2182,6692,22131, 72405,243806,822788,2815119,9679205,33551192, 116900081,409675567,1442454215,5102542680, 18124571838,64634480340,231334873091,830828150081, 2993489821771]

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