A216587 - OEIS

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A216587 as a simple table

`n`		`a(n)`
`0`		`-1`
`1`		`0`
`2`		`1`
`3`		`2`
`4`		`3`
`5`		`4`
`6`		`5`
`7`		`6`
`8`		`7`
`9`		`8`
`10`		`9`
`11`		`-1`
`12`		`-1`
`13`		`-1`
`14`		`-1`
`15`		`-1`
`16`		`-1`
`17`		`-1`
`18`		`-1`
`19`		`-1`
`20`		`-1`
`21`		`10`
`22`		`11`
`23`		`12`
`24`		`13`
`25`		`14`
`26`		`15`
`27`		`16`
`28`		`17`
`29`		`18`
`30`		`-1`
`31`		`20`
`32`		`21`
`33`		`22`
`34`		`23`
`35`		`24`
`36`		`25`
`37`		`26`
`38`		`27`
`39`		`28`
`40`		`-1`
`41`		`30`
`42`		`31`
`43`		`32`
`44`		`33`
`45`		`34`
`46`		`35`
`47`		`36`
`48`		`37`
`49`		`38`
`50`		`-1`
`51`		`40`
`52`		`41`
`53`		`42`
`54`		`43`
`55`		`44`
`56`		`45`
`57`		`46`
`58`		`47`
`59`		`48`
`60`		`-1`
`61`		`50`
`62`		`51`
`63`		`52`
`64`		`53`
`65`		`54`
`66`		`55`
`67`		`56`
`68`		`57`
`69`		`58`
`70`		`-1`
`71`		`60`
`72`		`61`
`73`		`62`
`74`		`63`

[-1,0,1,2,3,4,5,6,7,8,9,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,10,11,12,13,14,15,16,17,18,-1,20,21,22,23, 24,25,26,27,28,-1,30,31,32,33,34,35,36,37,38,-1, 40,41,42,43,44,45,46,47,48,-1,50,51,52,53,54,55, 56,57,58,-1,60,61,62,63]

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Last modified April 25 08:27 EDT 2024. Contains 371964 sequences. (Running on oeis4.)