A013569 as tables, graphs or sounds

A013569 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`-1`
`3`		`-1`
`4`		`9`
`5`		`-15`
`6`		`-25`
`7`		`471`
`8`		`-1295`
`9`		`3329`
`10`		`65647`
`11`		`-98129`
`12`		`3713721`
`13`		`33219953`
`14`		`270347415`
`15`		`6061172807`
`16`		`68349644129`
`17`		`1202915380097`
`18`		`19022739778399`
`19`		`352452078288991`
`20`		`6138793986311401`
`21`		`130474490203385201`

[1,1,-1,-1,9,-15,-25,471,-1295,3329,65647,-98129, 3713721,33219953,270347415,6061172807,68349644129, 1202915380097,19022739778399,352452078288991, 6138793986311401,130474490203385201]

Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

AT&T Labs Research