A064017 as tables, graphs or sounds

A064017 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`3`
`3`		`12`
`4`		`45`
`5`		`162`
`6`		`567`
`7`		`1944`
`8`		`6561`
`9`		`21870`
`10`		`72171`
`11`		`236196`
`12`		`767637`
`13`		`2480058`
`14`		`7971615`
`15`		`25509168`
`16`		`81310473`
`17`		`258280326`
`18`		`817887699`
`19`		`2582803260`
`20`		`8135830269`
`21`		`25569752274`
`22`		`80196041223`
`23`		`251048476872`
`24`		`784526490225`
`25`		`2447722649502`

[1,3,12,45,162,567,1944,6561,21870,72171,236196, 767637,2480058,7971615,25509168,81310473, 258280326,817887699,2582803260,8135830269, 25569752274,80196041223,251048476872,784526490225, 2447722649502]

Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

AT&T Labs Research