A156436 as tables, graphs or sounds

A156436 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`0`
`3`		`0`
`4`		`3`
`5`		`5`
`6`		`12`
`7`		`54`
`8`		`426`
`9`		`2334`
`10`		`23280`
`11`		`152820`
`12`		`1939740`
`13`		`14564760`
`14`		`222925920`
`15`		`1890254100`
`16`		`33899743010`
`17`		`320743643010`
`18`		`6597891367200`
`19`		`68944295861280`
`20`		`1600434039456630`
`21`		`18309730315533930`
`22`		`473501454337711800`

[1,0,0,3,5,12,54,426,2334,23280,152820,1939740, 14564760,222925920,1890254100,33899743010, 320743643010,6597891367200,68944295861280, 1600434039456630,18309730315533930, 473501454337711800]

Last modified December 9 14:43 EST 2009. Contains 170430 sequences.

AT&T Labs Research