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A057845 Numbers n such that n | 4^n + 2^n + 1. 0
1, 7, 49, 343, 2359, 2401, 16513, 16807, 115591, 117649, 794983, 809137, 823543 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..13.

MATHEMATICA

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

CROSSREFS

Sequence in context: A057833 A014949 A228738 * A269617 A269581 A269433

Adjacent sequences:  A057842 A057843 A057844 * A057846 A057847 A057848

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Nov 09 2000

STATUS

approved

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Last modified May 26 19:44 EDT 2019. Contains 323597 sequences. (Running on oeis4.)