A049976 as tables, graphs or sounds

A049976 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`3`
`3`		`4`
`4`		`9`
`5`		`21`
`6`		`39`
`7`		`81`
`8`		`179`
`9`		`418`
`10`		`756`
`11`		`1515`
`12`		`3047`
`13`		`6154`
`14`		`12645`
`15`		`26387`
`16`		`57413`
`17`		`135059`
`18`		`243732`
`19`		`487467`
`20`		`974951`
`21`		`1949962`
`22`		`3900261`
`23`		`7801619`
`24`		`15607877`
`25`		`31235987`
`26`		`62580646`
`27`		`125513700`
`28`		`252489895`
`29`		`510831447`
`30`		`1045097262`
`31`		`2184472237`

[1,3,4,9,21,39,81,179,418,756,1515,3047,6154, 12645,26387,57413,135059,243732,487467,974951, 1949962,3900261,7801619,15607877,31235987, 62580646,125513700,252489895,510831447,1045097262, 2184472237]

Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

AT&T Labs Research