A149424 as tables, graphs or sounds

A149424 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`4`
`3`		`13`
`4`		`40`
`5`		`136`
`6`		`496`
`7`		`1753`
`8`		`6256`
`9`		`22912`
`10`		`85216`
`11`		`314836`
`12`		`1170688`
`13`		`4396048`
`14`		`16623328`
`15`		`62744017`
`16`		`237680992`
`17`		`904962400`
`18`		`3459831424`
`19`		`13219219972`
`20`		`50621972224`
`21`		`194465172304`
`22`		`749061374848`
`23`		`2884682636764`
`24`		`11126422372864`
`25`		`43007603099296`
`26`		`166555051934848`
`27`		`644984620465264`
`28`		`2500560314630656`

[1,1,4,13,40,136,496,1753,6256,22912,85216,314836, 1170688,4396048,16623328,62744017,237680992, 904962400,3459831424,13219219972,50621972224, 194465172304,749061374848,2884682636764, 11126422372864,43007603099296,166555051934848, 644984620465264,2500560314630656]

Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

AT&T Labs Research