A053881 as tables, graphs or sounds

A053881 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`4`
`3`		`121`
`4`		`144`
`5`		`441`
`6`		`1444`
`7`		`114244`
`8`		`2214144`
`9`		`11142244`
`10`		`121242121`
`11`		`421111441`
`12`		`1111422244`
`13`		`44424414441`
`14`		`111114222244`
`15`		`11111142222244`
`16`		`214222214414224`
`17`		`242441124211441`
`18`		`411244411422244`
`19`		`1111111422222244`
`20`		`2111211444222241`

[1,4,121,144,441,1444,114244,2214144,11142244, 121242121,421111441,1111422244,44424414441, 111114222244,11111142222244,214222214414224, 242441124211441,411244411422244,1111111422222244, 2111211444222241]

Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

AT&T Labs Research