A028468 as tables, graphs or sounds

A028468 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`13`
`3`		`41`
`4`		`281`
`5`		`1183`
`6`		`6728`
`7`		`31529`
`8`		`167089`
`9`		`817991`
`10`		`4213133`
`11`		`21001799`
`12`		`106912793`
`13`		`536948224`
`14`		`2720246633`
`15`		`13704300553`
`16`		`69289288909`
`17`		`349519610713`
`18`		`1765722581057`
`19`		`8911652846951`
`20`		`45005025662792`

[1,1,13,41,281,1183,6728,31529,167089,817991, 4213133,21001799,106912793,536948224,2720246633, 13704300553,69289288909,349519610713, 1765722581057,8911652846951,45005025662792]

Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

AT&T Labs Research