A003221 - OEIS

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

A003221 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`0`
`2`		`0`
`3`		`2`
`4`		`3`
`5`		`24`
`6`		`130`
`7`		`930`
`8`		`7413`
`9`		`66752`
`10`		`667476`
`11`		`7342290`
`12`		`88107415`
`13`		`1145396472`
`14`		`16035550518`
`15`		`240533257874`
`16`		`3848532125865`
`17`		`65425046139840`
`18`		`1177650830516968`
`19`		`22375365779822562`
`20`		`447507315596451051`
`21`		`9397653627525472280`
`22`		`206748379805560389930`

[1,0,0,2,3,24,130,930,7413,66752,667476,7342290, 88107415,1145396472,16035550518,240533257874, 3848532125865,65425046139840,1177650830516968, 22375365779822562,447507315596451051, 9397653627525472280,206748379805560389930]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 23 03:30 EDT 2024. Contains 371906 sequences. (Running on oeis4.)