A006253 as tables, graphs or sounds

A006253 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`9`
`3`		`32`
`4`		`121`
`5`		`450`
`6`		`1681`
`7`		`6272`
`8`		`23409`
`9`		`87362`
`10`		`326041`
`11`		`1216800`
`12`		`4541161`
`13`		`16947842`
`14`		`63250209`
`15`		`236052992`
`16`		`880961761`
`17`		`3287794050`
`18`		`12270214441`
`19`		`45793063712`
`20`		`170902040409`
`21`		`637815097922`
`22`		`2380358351281`
`23`		`8883618307200`
`24`		`33154114877521`
`25`		`123732841202882`

[1,2,9,32,121,450,1681,6272,23409,87362,326041, 1216800,4541161,16947842,63250209,236052992, 880961761,3287794050,12270214441,45793063712, 170902040409,637815097922,2380358351281, 8883618307200,33154114877521,123732841202882]

Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

AT&T Labs Research