A001687 as tables, graphs or sounds

A001687 formatted as a simple table:

`n`		`a(n)`
`0`		`0`
`1`		`1`
`2`		`0`
`3`		`1`
`4`		`0`
`5`		`1`
`6`		`1`
`7`		`1`
`8`		`2`
`9`		`1`
`10`		`3`
`11`		`2`
`12`		`4`
`13`		`4`
`14`		`5`
`15`		`7`
`16`		`7`
`17`		`11`
`18`		`11`
`19`		`16`
`20`		`18`
`21`		`23`
`22`		`29`
`23`		`34`
`24`		`45`
`25`		`52`
`26`		`68`
`27`		`81`
`28`		`102`
`29`		`126`
`30`		`154`
`31`		`194`
`32`		`235`
`33`		`296`
`34`		`361`
`35`		`450`
`36`		`555`
`37`		`685`
`38`		`851`
`39`		`1046`
`40`		`1301`
`41`		`1601`
`42`		`1986`
`43`		`2452`
`44`		`3032`
`45`		`3753`
`46`		`4633`
`47`		`5739`
`48`		`7085`
`49`		`8771`
`50`		`10838`
`51`		`13404`
`52`		`16577`
`53`		`20489`
`54`		`25348`
`55`		`31327`

[0,1,0,1,0,1,1,1,2,1,3,2,4,4,5,7,7,11,11,16,18,23, 29,34,45,52,68,81,102,126,154,194,235,296,361,450, 555,685,851,1046,1301,1601,1986,2452,3032,3753, 4633,5739,7085,8771,10838,13404,16577,20489,25348, 31327]

Last modified November 27 14:17 EST 2009. Contains 167569 sequences.

AT&T Labs Research