A057263 - OEIS

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A057263

Numbers n such that n | 12^n + 11^n + 10^n + 9^n + 8^n + 7^n + 6^n.

1, 3, 7, 9, 21, 27, 49, 63, 81, 93, 99, 147, 189, 243, 343, 387, 441, 539, 567, 729, 777, 1029, 1323, 1701, 1953, 1971, 2079, 2183, 2187, 2401, 3087, 3969, 5103, 6561, 7077, 7203, 7533, 8019, 9261, 9423, 11277, 11319, 11907, 15309, 16807, 17739, 19683

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..47.

MATHEMATICA

Select[ Range[ 10^5 ], Mod[ PowerMod[ 12, #, # ] + PowerMod[ 11, #, # ] + PowerMod[ 10, #, # ] + PowerMod[ 9, #, # ] + PowerMod[ 8, #, # ] + PowerMod[ 7, #, # ] + PowerMod[ 6, #, # ], # ] == 0 & ]

With[{c=Range[6, 12]}, Select[Range[20000], Divisible[Total[c^#], #]&]] (* Harvey P. Dale, Feb 29 2012 *)

CROSSREFS

Sequence in context: A125227 A057286 A056745 * A057493 A003594 A014854

Adjacent sequences: A057260 A057261 A057262 * A057264 A057265 A057266

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Sep 22 2000

STATUS

approved