A231057 - OEIS

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A231057 as a simple table

`n`		`a(n)`
`1`		`0`
`2`		`2`
`3`		`6`
`4`		`20`
`5`		`68`
`6`		`230`
`7`		`778`
`8`		`2632`
`9`		`8904`
`10`		`30122`
`11`		`101902`
`12`		`344732`
`13`		`1166220`
`14`		`3945294`
`15`		`13346834`
`16`		`45152016`
`17`		`152748176`
`18`		`516743378`
`19`		`1748130326`
`20`		`5913882532`
`21`		`20006521300`
`22`		`67681576758`
`23`		`228965134106`
`24`		`774583500376`
`25`		`2620397211992`
`26`		`8864740270458`

[0,2,6,20,68,230,778,2632,8904,30122,101902, 344732,1166220,3945294,13346834,45152016, 152748176,516743378,1748130326,5913882532, 20006521300,67681576758,228965134106,774583500376, 2620397211992,8864740270458]

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Last modified September 1 18:06 EDT 2024. Contains 375593 sequences. (Running on oeis4.)