A117428 as tables, graphs or sounds

A117428 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`3`
`2`		`9`
`3`		`30`
`4`		`110`
`5`		`442`
`6`		`1908`
`7`		`8822`
`8`		`43330`
`9`		`224595`
`10`		`1221860`
`11`		`6953514`
`12`		`41232563`
`13`		`253992215`
`14`		`1620599471`
`15`		`10689986451`
`16`		`72734177909`
`17`		`509288018981`
`18`		`3663185604591`
`19`		`27027424720210`
`20`		`204246277508032`
`21`		`1578970198567932`

[1,3,9,30,110,442,1908,8822,43330,224595,1221860, 6953514,41232563,253992215,1620599471,10689986451, 72734177909,509288018981,3663185604591, 27027424720210,204246277508032,1578970198567932]

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

AT&T Labs Research