A175921 - OEIS

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A175921 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`2`
`3`		`2`
`4`		`-1`
`5`		`1`
`6`		`1`
`7`		`2`
`8`		`2`
`9`		`-1`
`10`		`1`
`11`		`1`
`12`		`2`
`13`		`2`
`14`		`-1`
`15`		`1`
`16`		`1`
`17`		`2`
`18`		`2`
`19`		`-1`
`20`		`1`
`21`		`1`
`22`		`2`
`23`		`2`
`24`		`-1`
`25`		`1`
`26`		`1`
`27`		`2`
`28`		`2`
`29`		`-1`
`30`		`1`
`31`		`1`
`32`		`2`
`33`		`2`
`34`		`-1`
`35`		`1`
`36`		`1`
`37`		`2`
`38`		`2`
`39`		`-1`
`40`		`1`
`41`		`1`
`42`		`2`
`43`		`2`
`44`		`-1`
`45`		`1`
`46`		`1`
`47`		`2`
`48`		`2`
`49`		`-1`
`50`		`1`
`51`		`1`
`52`		`2`
`53`		`2`
`54`		`-1`
`55`		`1`
`56`		`1`
`57`		`2`
`58`		`2`
`59`		`-1`
`60`		`1`
`61`		`1`
`62`		`2`
`63`		`2`
`64`		`-1`
`65`		`1`
`66`		`1`
`67`		`2`
`68`		`2`
`69`		`-1`
`70`		`1`
`71`		`1`
`72`		`2`
`73`		`2`
`74`		`-1`
`75`		`1`

[1,2,2,-1,1,1,2,2,-1,1,1,2,2,-1,1,1,2,2,-1,1,1,2, 2,-1,1,1,2,2,-1,1,1,2,2,-1,1,1,2,2,-1,1,1,2,2,-1, 1,1,2,2,-1,1,1,2,2,-1,1,1,2,2,-1,1,1,2,2,-1,1,1,2, 2,-1,1,1,2,2,-1,1]

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Last modified April 19 16:52 EDT 2024. Contains 371794 sequences. (Running on oeis4.)