A054474 as tables, graphs or sounds

A054474 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`20`
`3`		`176`
`4`		`1876`
`5`		`22064`
`6`		`275568`
`7`		`3584064`
`8`		`47995476`
`9`		`657037232`
`10`		`9150655216`
`11`		`129214858304`
`12`		`1845409805168`
`13`		`26606114089024`
`14`		`386679996988736`
`15`		`5658611409163008`
`16`		`83302885723872852`
`17`		`1232764004638179504`
`18`		`18327520881735288432`

[1,4,20,176,1876,22064,275568,3584064,47995476, 657037232,9150655216,129214858304,1845409805168, 26606114089024,386679996988736,5658611409163008, 83302885723872852,1232764004638179504, 18327520881735288432]

Last modified December 1 19:22 EST 2009. Contains 167811 sequences.

AT&T Labs Research