A027831 as tables, graphs or sounds

A027831 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`14`
`3`		`44`
`4`		`134`
`5`		`400`
`6`		`1184`
`7`		`3488`
`8`		`10252`
`9`		`30096`
`10`		`88296`
`11`		`258960`
`12`		`759368`
`13`		`2226560`
`14`		`6528256`
`15`		`19140352`
`16`		`56117392`
`17`		`164528960`
`18`		`482376160`
`19`		`1414257856`
`20`		`4146398048`
`21`		`12156629760`
`22`		`35641443840`
`23`		`104495439360`

[1,4,14,44,134,400,1184,3488,10252,30096,88296, 258960,759368,2226560,6528256,19140352,56117392, 164528960,482376160,1414257856,4146398048, 12156629760,35641443840,104495439360]

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

AT&T Labs Research