A000257 as tables, graphs or sounds

A000257 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`3`
`3`		`12`
`4`		`56`
`5`		`288`
`6`		`1584`
`7`		`9152`
`8`		`54912`
`9`		`339456`
`10`		`2149888`
`11`		`13891584`
`12`		`91287552`
`13`		`608583680`
`14`		`4107939840`
`15`		`28030648320`
`16`		`193100021760`
`17`		`1341536993280`
`18`		`9390758952960`
`19`		`66182491668480`
`20`		`469294031831040`
`21`		`3346270487838720`

[1,1,3,12,56,288,1584,9152,54912,339456,2149888, 13891584,91287552,608583680,4107939840, 28030648320,193100021760,1341536993280, 9390758952960,66182491668480,469294031831040, 3346270487838720]

Last modified December 5 23:38 EST 2009. Contains 170428 sequences.

AT&T Labs Research