A198798 - OEIS

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A198798 as a simple table

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

[1,-1,1,-1,1,5,-1,3,-1,1,7,-1,1,5,11,3,5,11,-1,1, 7,11,-1,7,11,13,17,-1,3,17,-1,5,7,17,19,1,7,11,17, 23,-1,9,11,15,17,1,13,17,19,23,-1,1,11,17,23,29, -1,5,9,11,21,1,5,7,11,25,31,5,7,11,17,25,31]

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Last modified April 27 23:22 EDT 2024. Contains 372020 sequences. (Running on oeis4.)