A020647 as tables, graphs or sounds

A020647 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`8`
`3`		`12`
`4`		`16`
`5`		`16`
`6`		`20`
`7`		`24`
`8`		`28`
`9`		`32`
`10`		`32`
`11`		`36`
`12`		`40`
`13`		`42`
`14`		`46`
`15`		`48`
`16`		`52`
`17`		`56`
`18`		`58`
`19`		`62`
`20`		`64`
`21`		`64`
`22`		`68`
`23`		`72`
`24`		`76`
`25`		`80`
`26`		`80`
`27`		`84`
`28`		`88`
`29`		`92`
`30`		`96`
`31`		`96`
`32`		`100`
`33`		`104`
`34`		`106`
`35`		`110`
`36`		`112`
`37`		`116`
`38`		`120`
`39`		`122`
`40`		`126`
`41`		`128`
`42`		`128`
`43`		`132`
`44`		`136`
`45`		`138`
`46`		`142`
`47`		`144`
`48`		`148`
`49`		`152`
`50`		`154`
`51`		`158`
`52`		`160`
`53`		`162`
`54`		`166`
`55`		`168`
`56`		`172`
`57`		`176`
`58`		`178`
`59`		`182`
`60`		`184`
`61`		`188`

[1,4,8,12,16,16,20,24,28,32,32,36,40,42,46,48,52, 56,58,62,64,64,68,72,76,80,80,84,88,92,96,96,100, 104,106,110,112,116,120,122,126,128,128,132,136, 138,142,144,148,152,154,158,160,162,166,168,172, 176,178,182,184,188]

Last modified December 9 14:43 EST 2009. Contains 170430 sequences.

AT&T Labs Research