A012840 as tables, graphs or sounds

A012840 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`1`
`3`		`6`
`4`		`21`
`5`		`120`
`6`		`765`
`7`		`5376`
`8`		`46473`
`9`		`415104`
`10`		`4371225`
`11`		`48143744`
`12`		`594635613`
`13`		`7784817664`
`14`		`110691178325`
`15`		`1673986906112`
`16`		`27018807872657`
`17`		`462531126525952`
`18`		`8370279766396593`
`19`		`159859054841331712`

[1,1,1,6,21,120,765,5376,46473,415104,4371225, 48143744,594635613,7784817664,110691178325, 1673986906112,27018807872657,462531126525952, 8370279766396593,159859054841331712]

Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research