A081548 as tables, graphs or sounds

A081548 formatted as a simple table:

`n`		`a(n)`
`1`		`4`
`2`		`15`
`3`		`106`
`4`		`391`
`5`		`3991`
`6`		`30031`
`7`		`510511`
`8`		`9699691`
`9`		`223092871`
`10`		`6469693231`
`11`		`255887521891`
`12`		`7420738134811`
`13`		`304250263527211`
`14`		`13082761331670031`
`15`		`614889782588491411`
`16`		`32589158477190044731`
`17`		`1922760350154212639071`

[4,15,106,391,3991,30031,510511,9699691,223092871, 6469693231,255887521891,7420738134811, 304250263527211,13082761331670031, 614889782588491411,32589158477190044731, 1922760350154212639071]

Last modified December 21 10:15 EST 2009. Contains 171081 sequences.

AT&T Labs Research