A158197 as tables, graphs or sounds

A158197 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`23`
`3`		`140`
`4`		`866`
`5`		`5388`
`6`		`33603`
`7`		`209796`
`8`		`1310510`
`9`		`8188328`
`10`		`51169094`
`11`		`319779544`
`12`		`1998527188`
`13`		`12490460620`
`14`		`78064190235`
`15`		`487896926580`
`16`		`3049340393430`
`17`		`19058321475960`
`18`		`119114304522450`
`19`		`744463650984360`
`20`		`4652895041524380`

[1,4,23,140,866,5388,33603,209796,1310510,8188328, 51169094,319779544,1998527188,12490460620, 78064190235,487896926580,3049340393430, 19058321475960,119114304522450,744463650984360, 4652895041524380]

Last modified December 4 08:07 EST 2009. Contains 170310 sequences.

AT&T Labs Research