A157560 as tables, graphs or sounds

A157560 formatted as a simple table:

`n`		`a(n)`
`2`		`1`
`3`		`9`
`4`		`54`
`5`		`4730`
`6`		`384345`
`7`		`17551611`
`8`		`639200583`
`9`		`21540673143`
`10`		`709364141280`
`11`		`22449552443395`
`12`		`690983408959437`
`13`		`20713553342449344`
`14`		`594627688939323130`
`15`		`16245942354519666285`
`16`		`424430686079103349170`
`17`		`10684143371864906288080`

[1,9,54,4730,384345,17551611,639200583, 21540673143,709364141280,22449552443395, 690983408959437,20713553342449344, 594627688939323130,16245942354519666285, 424430686079103349170,10684143371864906288080]

Last modified December 5 17:24 EST 2009. Contains 170342 sequences.

AT&T Labs Research