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Search: id:A063455
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| A063455 |
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Numbers n such that n | 9^n + 7^n + 5^n + 3^n. |
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+0
1
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| 1, 2, 3, 4, 9, 27, 51, 81, 82, 207, 243, 297, 729, 2187, 2277, 4131, 6561, 9668, 10233, 17457, 19683, 24057, 27028, 30699, 33777, 33849, 50301, 52351, 56727, 59049, 92097, 112102, 133837, 134297, 136809, 177147, 184437, 197667, 256243, 264357
(list; graph; listen)
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OFFSET
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1,2
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MATHEMATICA
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Select[ Range[ 200000 ], Mod[ PowerMod[ 9, #, # ] + PowerMod[ 7, #, # ] + PowerMod[ 5, #, # ] + PowerMod[ 3, #, # ], # ] == 0 & ]
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PROGRAM
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(PARI) j=[]; for(n=1, 20000, a=9^n+7^n+5^n+3^n; if(Mod(a, n) == 0, j=concat(j, n))); j
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CROSSREFS
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Sequence in context: A085612 A073915 A076381 this_sequence A001144 A121253 A014118
Adjacent sequences: A063452 A063453 A063454 this_sequence A063456 A063457 A063458
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KEYWORD
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nonn
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AUTHOR
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Jason Earls (jcearls(AT)cableone.net), Jul 25 2001
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(AT)rgwv.com) and Dean Hickerson, Jul 26 2001
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