A326925 - OEIS

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A326925 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`-1`
`3`		`0`
`4`		`2`
`5`		`-1`
`6`		`1`
`7`		`0`
`8`		`3`
`9`		`-1`
`10`		`1`
`11`		`4`
`12`		`0`
`13`		`4`
`14`		`-1`
`15`		`2`
`16`		`5`
`17`		`10`
`18`		`0`
`19`		`5`
`20`		`-1`
`21`		`3`
`22`		`12`
`23`		`15`
`24`		`20`
`25`		`0`
`26`		`6`
`27`		`-1`
`28`		`5`
`29`		`21`
`30`		`42`
`31`		`35`
`32`		`35`
`33`		`0`
`34`		`7`
`35`		`-1`
`36`		`8`
`37`		`40`
`38`		`84`
`39`		`112`
`40`		`70`
`41`		`56`
`42`		`0`
`43`		`8`
`44`		`-1`
`45`		`13`
`46`		`72`
`47`		`180`
`48`		`252`
`49`		`252`
`50`		`126`
`51`		`84`
`52`		`0`
`53`		`9`
`54`		`-1`
`55`		`21`
`56`		`130`
`57`		`360`
`58`		`600`
`59`		`630`
`60`		`504`
`61`		`210`
`62`		`120`
`63`		`0`
`64`		`10`
`65`		`-1`
`66`		`34`
`67`		`231`
`68`		`715`

[1,-1,0,2,-1,1,0,3,-1,1,4,0,4,-1,2,5,10,0,5,-1,3, 12,15,20,0,6,-1,5,21,42,35,35,0,7,-1,8,40,84,112, 70,56,0,8,-1,13,72,180,252,252,126,84,0,9,-1,21, 130,360,600,630,504,210,120,0,10,-1,34,231,715]

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Last modified July 30 02:43 EDT 2024. Contains 374734 sequences. (Running on oeis4.)