A081972 as tables, graphs or sounds

A081972 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`1`
`3`		`4`
`4`		`34`
`5`		`528`
`6`		`16644`
`7`		`1056832`
`8`		`134744072`
`9`		`34426978560`
`10`		`17609382707216`
`11`		`18023198899569664`
`12`		`36902497546234101792`
`13`		`151134176447977081540608`
`14`		`1238015601761073699807559744`
`15`		`20283028592561355523908308058112`

[1,1,4,34,528,16644,1056832,134744072,34426978560, 17609382707216,18023198899569664, 36902497546234101792,151134176447977081540608, 1238015601761073699807559744, 20283028592561355523908308058112]

Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

AT&T Labs Research