A031148 as tables, graphs or sounds

A031148 formatted as a simple table:

`n`		`a(n)`
`1`		`2`
`2`		`1`
`3`		`2`
`4`		`5`
`5`		`14`
`6`		`43`
`7`		`138`
`8`		`455`
`9`		`1540`
`10`		`5305`
`11`		`18546`
`12`		`65616`
`13`		`234546`
`14`		`845683`
`15`		`3072350`
`16`		`11235393`
`17`		`41326470`
`18`		`152793376`
`19`		`567518950`
`20`		`2116666670`
`21`		`7924062430`
`22`		`29765741831`
`23`		`112157686170`
`24`		`423809991041`
`25`		`1605622028100`

[2,1,2,5,14,43,138,455,1540,5305,18546,65616, 234546,845683,3072350,11235393,41326470,152793376, 567518950,2116666670,7924062430,29765741831, 112157686170,423809991041,1605622028100]

Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

AT&T Labs Research