A129869 - OEIS

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A129869 as a simple table

`n`		`a(n)`
`1`		`-1`
`2`		`1`
`3`		`5`
`4`		`20`
`5`		`77`
`6`		`294`
`7`		`1122`
`8`		`4290`
`9`		`16445`
`10`		`63206`
`11`		`243542`
`12`		`940576`
`13`		`3640210`
`14`		`14115100`
`15`		`54826020`
`16`		`213286590`
`17`		`830905245`
`18`		`3241119750`
`19`		`12657425550`
`20`		`49483369320`
`21`		`193641552390`
`22`		`758454277620`
`23`		`2973183318300`
`24`		`11664026864100`
`25`		`45791597230002`
`26`		`179892016853724`

[-1,1,5,20,77,294,1122,4290,16445,63206,243542, 940576,3640210,14115100,54826020,213286590, 830905245,3241119750,12657425550,49483369320, 193641552390,758454277620,2973183318300, 11664026864100,45791597230002,179892016853724]

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Last modified April 19 14:10 EDT 2024. Contains 371792 sequences. (Running on oeis4.)