A057842 - OEIS

A057842

Numbers k such that k | 6^k + 4^k + 2^k + 1.

1, 13, 4381, 560129, 606797, 3512659, 4102673, 26748149

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OFFSET

1,2

COMMENTS

Numbers k that divide A074533(k)+1. - Michel Marcus, Oct 30 2025

LINKS

MATHEMATICA

Select[ Range[ 10^6 ], Mod[ PowerMod[ 6, #, # ] + PowerMod[ 4, #, # ] + PowerMod[ 2, #, # ] + 1, # ] == 0 & ]

PROG

(PARI) isok(n) = Mod(6, n)^n + Mod(4, n)^n + Mod(2, n)^n == -1 \\ Andrew Howroyd, Oct 30 2025

CROSSREFS

KEYWORD

nonn,more

AUTHOR

EXTENSIONS

a(6)-a(8) from Andrew Howroyd, Oct 30 2025

STATUS

approved