A123611 as tables, graphs or sounds

A123611 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`4`
`3`		`8`
`4`		`20`
`5`		`52`
`6`		`160`
`7`		`492`
`8`		`1620`
`9`		`5408`
`10`		`18504`
`11`		`64132`
`12`		`225440`
`13`		`800048`
`14`		`2865720`
`15`		`10341208`
`16`		`37568340`
`17`		`137270956`
`18`		`504176992`
`19`		`1860277044`
`20`		`6892335720`
`21`		`25631327688`
`22`		`95640894056`
`23`		`357975249028`
`24`		`1343650267296`
`25`		`5056424257552`

[1,2,4,8,20,52,160,492,1620,5408,18504,64132, 225440,800048,2865720,10341208,37568340,137270956, 504176992,1860277044,6892335720,25631327688, 95640894056,357975249028,1343650267296, 5056424257552]

Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

AT&T Labs Research