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Search: id:A081509
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A081509 Primes of form 1+2^n+4^n+6^n form. +0
1
13, 366993409, 789800591806169089, 8145612997113849913833354347764846494983651329 (list; graph; listen)
OFFSET

1,1

EXAMPLE

m=1:1+2+4+6=13 prime;

MATHEMATICA

Do[s=1^w+2^w+4^w+6^w; If[IntegerQ[w/100], Print[{w}]]; If[PrimeQ[s], Print[{w, s}]], {w, 0, 1000}]

CROSSREFS

Sequence in context: A034248 A158750 A145744 this_sequence A145234 A048847 A093671

Adjacent sequences: A081506 A081507 A081508 this_sequence A081510 A081511 A081512

KEYWORD

nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu), Apr 15 2003

EXTENSIONS

a(5) has more than 300 decimal digits;

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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