A139400 as tables, graphs or sounds

A139400 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`780`
`3`		`380160`
`4`		`170537640`
`5`		`74795194705`
`6`		`32565539635200`
`7`		`14143261515284447`
`8`		`6136973985625588560`
`9`		`2662079368040434932480`
`10`		`1154617875754582889149500`
`11`		`500769437567956298239402223`
`12`		`217185579535490113365186969600`

[1,780,380160,170537640,74795194705, 32565539635200,14143261515284447, 6136973985625588560,2662079368040434932480, 1154617875754582889149500, 500769437567956298239402223, 217185579535490113365186969600]

Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

AT&T Labs Research