A021404 as tables, graphs or sounds

A021404 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`20`
`2`		`285`
`3`		`3640`
`4`		`44681`
`5`		`540540`
`6`		`6505045`
`7`		`78138080`
`8`		`937976961`
`9`		`11257033060`
`10`		`135089723405`
`11`		`1621098253320`
`12`		`19453266126841`
`13`		`233439544261580`
`14`		`2801275941271365`
`15`		`33615316957309360`
`16`		`403383826200494321`

[1,20,285,3640,44681,540540,6505045,78138080, 937976961,11257033060,135089723405,1621098253320, 19453266126841,233439544261580,2801275941271365, 33615316957309360,403383826200494321]

Last modified December 20 16:54 EST 2009. Contains 171081 sequences.

AT&T Labs Research