A105480 as tables, graphs or sounds

A105480 formatted as a simple table:

`n`		`a(n)`
`4`		`1`
`5`		`4`
`6`		`20`
`7`		`100`
`8`		`525`
`9`		`2912`
`10`		`17052`
`11`		`105240`
`12`		`683100`
`13`		`4652340`
`14`		`33168850`
`15`		`246999480`
`16`		`1917186635`
`17`		`15480884720`
`18`		`129811538960`
`19`		`1128494172720`
`20`		`10155257740443`
`21`		`94465951576560`
`22`		`907162152191470`
`23`		`8982422995787780`
`24`		`91603484234843812`

[1,4,20,100,525,2912,17052,105240,683100,4652340, 33168850,246999480,1917186635,15480884720, 129811538960,1128494172720,10155257740443, 94465951576560,907162152191470,8982422995787780, 91603484234843812]

Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

AT&T Labs Research