A331430 - OEIS

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A331430 as a simple table

`n`		`a(n)`
`0`		`-1`
`1`		`-1`
`2`		`2`
`3`		`-1`
`4`		`6`
`5`		`-6`
`6`		`-1`
`7`		`12`
`8`		`-30`
`9`		`20`
`10`		`-1`
`11`		`20`
`12`		`-90`
`13`		`140`
`14`		`-70`
`15`		`-1`
`16`		`30`
`17`		`-210`
`18`		`560`
`19`		`-630`
`20`		`252`
`21`		`-1`
`22`		`42`
`23`		`-420`
`24`		`1680`
`25`		`-3150`
`26`		`2772`
`27`		`-924`
`28`		`-1`
`29`		`56`
`30`		`-756`
`31`		`4200`
`32`		`-11550`
`33`		`16632`
`34`		`-12012`
`35`		`3432`
`36`		`-1`
`37`		`72`
`38`		`-1260`
`39`		`9240`
`40`		`-34650`
`41`		`72072`
`42`		`-84084`
`43`		`51480`
`44`		`-12870`
`45`		`-1`
`46`		`90`
`47`		`-1980`
`48`		`18480`
`49`		`-90090`
`50`		`252252`
`51`		`-420420`
`52`		`411840`
`53`		`-218790`
`54`		`48620`
`55`		`-1`
`56`		`110`
`57`		`-2970`
`58`		`34320`
`59`		`-210210`
`60`		`756756`
`61`		`-1681680`
`62`		`2333760`
`63`		`-1969110`
`64`		`923780`
`65`		`-184756`

[-1,-1,2,-1,6,-6,-1,12,-30,20,-1,20,-90,140,-70, -1,30,-210,560,-630,252,-1,42,-420,1680,-3150, 2772,-924,-1,56,-756,4200,-11550,16632,-12012, 3432,-1,72,-1260,9240,-34650,72072,-84084,51480, -12870,-1,90,-1980,18480,-90090,252252,-420420, 411840,-218790,48620,-1,110,-2970,34320,-210210, 756756,-1681680,2333760,-1969110,923780,-184756]

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)