A010905 as tables, graphs or sounds

A010905 formatted as a simple table:

`n`		`a(n)`
`0`		`4`
`1`		`15`
`2`		`56`
`3`		`209`
`4`		`780`
`5`		`2911`
`6`		`10864`
`7`		`40545`
`8`		`151316`
`9`		`564719`
`10`		`2107560`
`11`		`7865521`
`12`		`29354524`
`13`		`109552575`
`14`		`408855776`
`15`		`1525870529`
`16`		`5694626340`
`17`		`21252634831`
`18`		`79315912984`
`19`		`296011017105`
`20`		`1104728155436`
`21`		`4122901604639`

[4,15,56,209,780,2911,10864,40545,151316,564719, 2107560,7865521,29354524,109552575,408855776, 1525870529,5694626340,21252634831,79315912984, 296011017105,1104728155436,4122901604639]

Last modified December 9 18:50 EST 2009. Contains 170568 sequences.

AT&T Labs Research