A206405 - OEIS

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

A206405 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`3`
`3`		`20`
`4`		`218`
`5`		`3414`
`6`		`70306`
`7`		`1789850`
`8`		`54071216`
`9`		`1886496960`
`10`		`74588759664`
`11`		`3295393803888`
`12`		`160898970043632`
`13`		`8603780292835896`
`14`		`500078481148348176`
`15`		`31391957137745933088`
`16`		`2116613399519305596384`
`17`		`152558384742741641353056`
`18`		`11705479592386152200155200`

[1,3,20,218,3414,70306,1789850,54071216, 1886496960,74588759664,3295393803888, 160898970043632,8603780292835896, 500078481148348176,31391957137745933088, 2116613399519305596384,152558384742741641353056, 11705479592386152200155200]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 25 11:37 EDT 2024. Contains 371968 sequences. (Running on oeis4.)