A017939 as tables, graphs or sounds

A017939 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`11`
`3`		`37`
`4`		`121`
`5`		`402`
`6`		`1331`
`7`		`4415`
`8`		`14641`
`9`		`48559`
`10`		`161051`
`11`		`534146`
`12`		`1771561`
`13`		`5875604`
`14`		`19487171`
`15`		`64631635`
`16`		`214358881`
`17`		`710947979`
`18`		`2357947691`
`19`		`7820427767`
`20`		`25937424601`
`21`		`86024705430`
`22`		`285311670611`

[1,4,11,37,121,402,1331,4415,14641,48559,161051, 534146,1771561,5875604,19487171,64631635, 214358881,710947979,2357947691,7820427767, 25937424601,86024705430,285311670611]

Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

AT&T Labs Research