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A057831 Numbers n such that n | 9^n + 7^n + 5^n + 3^n +1. 0
1, 5, 25, 125, 625, 925, 3125, 5675, 15625, 15845, 70625, 78125, 390625, 1223375, 1953125, 4328125, 5328475, 9765625 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..18.

MATHEMATICA

Select[ Range[ 10^7 ], Mod[ PowerMod[ 9, #, # ] + PowerMod[ 7, #, # ] + PowerMod[ 5, #, # ] + PowerMod[ 3, #, # ] + 1, # ] == 0 & ]

CROSSREFS

Sequence in context: A163844 A250357 A216125 * A014946 A188580 A132839

Adjacent sequences:  A057828 A057829 A057830 * A057832 A057833 A057834

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Nov 08 2000

STATUS

approved

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Last modified June 1 18:43 EDT 2020. Contains 334762 sequences. (Running on oeis4.)