A030820 as tables, graphs or sounds

A030820 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`2`
`3`		`8`
`4`		`35`
`5`		`177`
`6`		`1064`
`7`		`7453`
`8`		`59629`
`9`		`536666`
`10`		`5366663`
`11`		`59033296`
`12`		`708399560`
`13`		`9209194286`
`14`		`128928720014`
`15`		`1933930800218`
`16`		`30942892803488`
`17`		`526029177659298`
`18`		`9468525197867367`
`19`		`179901978759479980`
`20`		`3598039575189599601`

[1,2,8,35,177,1064,7453,59629,536666,5366663, 59033296,708399560,9209194286,128928720014, 1933930800218,30942892803488,526029177659298, 9468525197867367,179901978759479980, 3598039575189599601]

Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

AT&T Labs Research