A216479 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A216479 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`-1`
`3`		`111`
`4`		`-1`
`5`		`-1`
`6`		`-1`
`7`		`111111`
`8`		`-1`
`9`		`111111111`
`10`		`-1`
`11`		`11`
`12`		`-1`
`13`		`111111`
`14`		`-1`
`15`		`-1`
`16`		`-1`
`17`		`1111111111111111`
`18`		`-1`
`19`		`111111111111111111`
`20`		`-1`
`21`		`111111`
`22`		`-1`
`23`		`1111111111111111111111`
`24`		`-1`
`25`		`-1`
`26`		`-1`
`27`		`111111111111111111111111111`
`28`		`-1`
`29`		`1111111111111111111111111111`
`30`		`-1`
`31`		`111111111111111`
`32`		`-1`
`33`		`111111`
`34`		`-1`
`35`		`-1`
`36`		`-1`
`37`		`111`
`38`		`-1`
`39`		`111111`
`40`		`-1`
`41`		`11111`
`42`		`-1`

[1,-1,111,-1,-1,-1,111111,-1,111111111,-1,11,-1, 111111,-1,-1,-1,1111111111111111,-1, 111111111111111111,-1,111111,-1, 1111111111111111111111,-1,-1,-1, 111111111111111111111111111,-1, 1111111111111111111111111111,-1,111111111111111, -1,111111,-1,-1,-1,111,-1,111111,-1,11111,-1]

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 12 22:20 EDT 2024. Contains 375855 sequences. (Running on oeis4.)