A137569 as tables, graphs or sounds

A137569 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`-1`
`2`		`-1`
`3`		`1`
`4`		`-1`
`5`		`0`
`6`		`2`
`7`		`-1`
`8`		`-1`
`9`		`3`
`10`		`-2`
`11`		`-1`
`12`		`4`
`13`		`-3`
`14`		`-2`
`15`		`5`
`16`		`-4`
`17`		`-2`
`18`		`8`
`19`		`-6`
`20`		`-4`
`21`		`10`
`22`		`-7`
`23`		`-4`
`24`		`14`
`25`		`-10`
`26`		`-6`
`27`		`18`
`28`		`-13`
`29`		`-7`
`30`		`24`
`31`		`-17`
`32`		`-10`
`33`		`30`
`34`		`-21`
`35`		`-12`
`36`		`40`
`37`		`-28`
`38`		`-17`
`39`		`49`
`40`		`-35`
`41`		`-19`
`42`		`63`
`43`		`-44`
`44`		`-26`
`45`		`78`
`46`		`-55`
`47`		`-31`
`48`		`98`
`49`		`-69`
`50`		`-40`
`51`		`120`
`52`		`-84`
`53`		`-47`
`54`		`150`
`55`		`-105`
`56`		`-61`
`57`		`182`
`58`		`-127`
`59`		`-71`
`60`		`224`
`61`		`-156`
`62`		`-90`
`63`		`271`
`64`		`-189`
`65`		`-106`
`66`		`330`
`67`		`-229`
`68`		`-131`
`69`		`396`
`70`		`-275`

[1,-1,-1,1,-1,0,2,-1,-1,3,-2,-1,4,-3,-2,5,-4,-2,8, -6,-4,10,-7,-4,14,-10,-6,18,-13,-7,24,-17,-10,30, -21,-12,40,-28,-17,49,-35,-19,63,-44,-26,78,-55, -31,98,-69,-40,120,-84,-47,150,-105,-61,182,-127, -71,224,-156,-90,271,-189,-106,330,-229,-131,396, -275]

Last modified December 21 10:15 EST 2009. Contains 171081 sequences.

AT&T Labs Research