A053509 as tables, graphs or sounds

A053509 formatted as a simple table:

`n`		`a(n)`
`1`		`0`
`2`		`0`
`3`		`0`
`4`		`0`
`5`		`1`
`6`		`30`
`7`		`735`
`8`		`17920`
`9`		`459270`
`10`		`12600000`
`11`		`372027810`
`12`		`11824496640`
`13`		`403786706895`
`14`		`14772648450560`
`15`		`577227041015625`
`16`		`24013333950627840`
`17`		`1060372471758165020`
`18`		`49558656380297379840`
`19`		`2444960458495625410260`
`20`		`127008768000000000000000`

[0,0,0,0,1,30,735,17920,459270,12600000,372027810, 11824496640,403786706895,14772648450560, 577227041015625,24013333950627840, 1060372471758165020,49558656380297379840, 2444960458495625410260,127008768000000000000000]

Last modified December 21 10:15 EST 2009. Contains 171081 sequences.

AT&T Labs Research