A060841 as tables, graphs or sounds

A060841 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`4`
`3`		`18`
`4`		`144`
`5`		`900`
`6`		`16200`
`7`		`132300`
`8`		`2116800`
`9`		`28576800`
`10`		`714420000`
`11`		`8644482000`
`12`		`311201352000`
`13`		`4382752374000`
`14`		`143169910884000`
`15`		`4026653743612500`
`16`		`128852919795600000`
`17`		`2327405863808025000`
`18`		`125679916645633350000`

[1,4,18,144,900,16200,132300,2116800,28576800, 714420000,8644482000,311201352000,4382752374000, 143169910884000,4026653743612500, 128852919795600000,2327405863808025000, 125679916645633350000]

Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

AT&T Labs Research