A001117 as tables, graphs or sounds

A001117 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`0`
`2`		`0`
`3`		`6`
`4`		`36`
`5`		`150`
`6`		`540`
`7`		`1806`
`8`		`5796`
`9`		`18150`
`10`		`55980`
`11`		`171006`
`12`		`519156`
`13`		`1569750`
`14`		`4733820`
`15`		`14250606`
`16`		`42850116`
`17`		`128746950`
`18`		`386634060`
`19`		`1160688606`
`20`		`3483638676`
`21`		`10454061750`
`22`		`31368476700`
`23`		`94118013006`
`24`		`282379204836`
`25`		`847187946150`
`26`		`2541664501740`
`27`		`7625194831806`

[1,0,0,6,36,150,540,1806,5796,18150,55980,171006, 519156,1569750,4733820,14250606,42850116, 128746950,386634060,1160688606,3483638676, 10454061750,31368476700,94118013006,282379204836, 847187946150,2541664501740,7625194831806]

Last modified December 9 18:50 EST 2009. Contains 170568 sequences.

AT&T Labs Research