A018930 as tables, graphs or sounds

A018930 formatted as a simple table:

`n`		`a(n)`
`1`		`3`
`2`		`4`
`3`		`12`
`4`		`84`
`5`		`132`
`6`		`12324`
`7`		`1836`
`8`		`105552`
`9`		`255084`
`10`		`197580`
`11`		`10358340`
`12`		`13775220`
`13`		`1936434780`
`14`		`51299286012`
`15`		`123205977516`
`16`		`862441842612`
`17`		`1310543298204`
`18`		`667510076211780`
`19`		`207181940072172`
`20`		`110912831751840`
`21`		`1698410314006284`

[3,4,12,84,132,12324,1836,105552,255084,197580, 10358340,13775220,1936434780,51299286012, 123205977516,862441842612,1310543298204, 667510076211780,207181940072172,110912831751840, 1698410314006284]

Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

AT&T Labs Research