A013261 as tables, graphs or sounds

A013261 formatted as a simple table:

`n`		`a(n)`
`0`		`-1`
`1`		`1`
`2`		`-6`
`3`		`23`
`4`		`-90`
`5`		`509`
`6`		`-1960`
`7`		`7251`
`8`		`20160`
`9`		`-1028821`
`10`		`16750008`
`11`		`-249844519`
`12`		`3354647296`
`13`		`-42644099135`
`14`		`506129014560`
`15`		`-4945670890617`
`16`		`23557830350976`
`17`		`694520543221487`
`18`		`-32533456838195320`
`19`		`956551460942273757`

[-1,1,-6,23,-90,509,-1960,7251,20160,-1028821, 16750008,-249844519,3354647296,-42644099135, 506129014560,-4945670890617,23557830350976, 694520543221487,-32533456838195320, 956551460942273757]

Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

AT&T Labs Research