A037980 as tables, graphs or sounds

A037980 formatted as a simple table:

`n`		`a(n)`
`0`		`0`
`1`		`1`
`2`		`4`
`3`		`109`
`4`		`800`
`5`		`19501`
`6`		`168952`
`7`		`3979830`
`8`		`37566720`
`9`		`862687045`
`10`		`8615396504`
`11`		`193710517650`
`12`		`2015475061184`
`13`		`44516469004294`
`14`		`478043160040240`
`15`		`10399216983867484`
`16`		`114539008771344384`
`17`		`2459029841101222485`

[0,1,4,109,800,19501,168952,3979830,37566720, 862687045,8615396504,193710517650,2015475061184, 44516469004294,478043160040240,10399216983867484, 114539008771344384,2459029841101222485]

Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

AT&T Labs Research