A251551 - OEIS

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A251551 as a simple table

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

[-1,1,-1,1,1,1,1,1,-1,3,3,3,3,3,-1,7,7,7,7,7,7,5, 1,1,1,1,1,1,1,-1,5,5,11,11,11,11,11,11,19,19,21, 21,17,17,17,17,17,23,23,23,17,17,17,17,17,25,25, 25,25,25,23,17]

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Last modified April 16 17:36 EDT 2024. Contains 371749 sequences. (Running on oeis4.)