A138240 as tables, graphs or sounds

A138240 formatted as a simple table:

`n`		`a(n)`
`0`		`0`
`1`		`1`
`2`		`6`
`3`		`40`
`4`		`296`
`5`		`2400`
`6`		`20928`
`7`		`192768`
`8`		`1848960`
`9`		`18277888`
`10`		`184890368`
`11`		`1904259072`
`12`		`19898765312`
`13`		`210424545280`
`14`		`2247494172672`
`15`		`24209586782208`
`16`		`262696649785344`
`17`		`2868744309571584`
`18`		`31504024885002240`
`19`		`347697247933169664`

[0,1,6,40,296,2400,20928,192768,1848960,18277888, 184890368,1904259072,19898765312,210424545280, 2247494172672,24209586782208,262696649785344, 2868744309571584,31504024885002240, 347697247933169664]

Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

AT&T Labs Research