A002803 as tables, graphs or sounds

A002803 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`15`
`2`		`140`
`3`		`1050`
`4`		`6930`
`5`		`42042`
`6`		`240240`
`7`		`1312740`
`8`		`6928350`
`9`		`35565530`
`10`		`178474296`
`11`		`878850700`
`12`		`4259045700`
`13`		`20359174500`
`14`		`96172862400`
`15`		`449608131720`
`16`		`2082743551350`
`17`		`9569730173850`
`18`		`43651400793000`
`19`		`197809768856700`

[1,15,140,1050,6930,42042,240240,1312740,6928350, 35565530,178474296,878850700,4259045700, 20359174500,96172862400,449608131720, 2082743551350,9569730173850,43651400793000, 197809768856700]

Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

AT&T Labs Research