A057831 Numbers n such that n | 9^n + 7^n + 5^n + 3^n +1.

1, 5, 25, 125, 625, 925, 3125, 5675, 15625, 15845, 70625, 78125, 390625, 1223375, 1953125, 4328125, 5328475, 9765625

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