A053409 as tables, graphs or sounds

A053409 formatted as a simple table:

`n`		`a(n)`
`1`		`21`
`2`		`34`
`3`		`55`
`4`		`377`
`5`		`4181`
`6`		`17711`
`7`		`121393`
`8`		`1346269`
`9`		`5702887`
`10`		`165580141`
`11`		`53316291173`
`12`		`956722026041`
`13`		`2504730781961`
`14`		`308061521170129`
`15`		`806515533049393`
`16`		`14472334024676221`
`17`		`1779979416004714189`
`18`		`19740274219868223167`

[21,34,55,377,4181,17711,121393,1346269,5702887, 165580141,53316291173,956722026041,2504730781961, 308061521170129,806515533049393,14472334024676221, 1779979416004714189,19740274219868223167]

Last modified December 7 08:40 EST 2009. Contains 170430 sequences.

AT&T Labs Research