A001678 as tables, graphs or sounds

A001678 formatted as a simple table:

`n`		`a(n)`
`0`		`0`
`1`		`0`
`2`		`1`
`3`		`0`
`4`		`1`
`5`		`1`
`6`		`2`
`7`		`3`
`8`		`6`
`9`		`10`
`10`		`19`
`11`		`35`
`12`		`67`
`13`		`127`
`14`		`248`
`15`		`482`
`16`		`952`
`17`		`1885`
`18`		`3765`
`19`		`7546`
`20`		`15221`
`21`		`30802`
`22`		`62620`
`23`		`127702`
`24`		`261335`
`25`		`536278`
`26`		`1103600`
`27`		`2276499`
`28`		`4706985`
`29`		`9752585`
`30`		`20247033`
`31`		`42110393`
`32`		`87733197`
`33`		`183074638`
`34`		`382599946`
`35`		`800701320`
`36`		`1677922740`
`37`		`3520581954`

[0,0,1,0,1,1,2,3,6,10,19,35,67,127,248,482,952, 1885,3765,7546,15221,30802,62620,127702,261335, 536278,1103600,2276499,4706985,9752585,20247033, 42110393,87733197,183074638,382599946,800701320, 1677922740,3520581954]

Last modified December 4 15:11 EST 2009. Contains 170347 sequences.

AT&T Labs Research