A126905 as tables, graphs or sounds

A126905 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`20`
`2`		`210`
`3`		`1540`
`4`		`8855`
`5`		`42504`
`6`		`177100`
`7`		`657800`
`8`		`2220075`
`9`		`6906900`
`10`		`20030015`
`11`		`54627400`
`12`		`141121575`
`13`		`347381300`
`14`		`818853475`
`15`		`1856180040`
`16`		`4060814450`
`17`		`8600785600`
`18`		`17683732275`
`19`		`35379798300`
`20`		`69023414470`
`21`		`131555545100`
`22`		`245368274925`
`23`		`448512194200`
`24`		`804566566400`

[1,20,210,1540,8855,42504,177100,657800,2220075, 6906900,20030015,54627400,141121575,347381300, 818853475,1856180040,4060814450,8600785600, 17683732275,35379798300,69023414470,131555545100, 245368274925,448512194200,804566566400]

Last modified December 21 10:15 EST 2009. Contains 171081 sequences.

AT&T Labs Research