A156991 as tables, graphs or sounds

A156991 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`0`
`2`		`1`
`3`		`0`
`4`		`2`
`5`		`6`
`6`		`0`
`7`		`6`
`8`		`24`
`9`		`60`
`10`		`0`
`11`		`24`
`12`		`120`
`13`		`360`
`14`		`840`
`15`		`0`
`16`		`120`
`17`		`720`
`18`		`2520`
`19`		`6720`
`20`		`15120`
`21`		`0`
`22`		`720`
`23`		`5040`
`24`		`20160`
`25`		`60480`
`26`		`151200`
`27`		`332640`
`28`		`0`
`29`		`5040`
`30`		`40320`
`31`		`181440`
`32`		`604800`
`33`		`1663200`
`34`		`3991680`
`35`		`8648640`
`36`		`0`
`37`		`40320`
`38`		`362880`
`39`		`1814400`
`40`		`6652800`
`41`		`19958400`
`42`		`51891840`

[1,0,1,0,2,6,0,6,24,60,0,24,120,360,840,0,120,720, 2520,6720,15120,0,720,5040,20160,60480,151200, 332640,0,5040,40320,181440,604800,1663200,3991680, 8648640,0,40320,362880,1814400,6652800,19958400, 51891840]

Last modified December 6 11:04 EST 2009. Contains 170427 sequences.

AT&T Labs Research