A121555 as tables, graphs or sounds

A121555 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`2`
`3`		`7`
`4`		`32`
`5`		`178`
`6`		`1164`
`7`		`8748`
`8`		`74304`
`9`		`704016`
`10`		`7362720`
`11`		`84255840`
`12`		`1047358080`
`13`		`14054739840`
`14`		`202514376960`
`15`		`3118666924800`
`16`		`51119166873600`
`17`		`888640952371200`
`18`		`16330301780889600`
`19`		`316322420114534400`
`20`		`6441691128993792000`

[1,2,7,32,178,1164,8748,74304,704016,7362720, 84255840,1047358080,14054739840,202514376960, 3118666924800,51119166873600,888640952371200, 16330301780889600,316322420114534400, 6441691128993792000]

Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

AT&T Labs Research