A117574 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A117574 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`2`
`3`		`6`
`4`		`20`
`5`		`80`
`6`		`384`
`7`		`2240`
`8`		`15424`
`9`		`123456`
`10`		`1110928`
`11`		`11287232`
`12`		`127016304`
`13`		`1565107248`
`14`		`20935873872`
`15`		`301974271248`
`16`		`4669727780624`
`17`		`77046043259824`
`18`		`1350585114106416`
`19`		`25062108668100208`
`20`		`490725684463001488`
`21`		`10109820295907492304`

[1,1,2,6,20,80,384,2240,15424,123456,1110928, 11287232,127016304,1565107248,20935873872, 301974271248,4669727780624,77046043259824, 1350585114106416,25062108668100208, 490725684463001488,10109820295907492304]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 24 04:14 EDT 2024. Contains 371918 sequences. (Running on oeis4.)