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A081508
Primes of form 1 + 3^k + 5^k.
2
3, 244672067, 14551915378461487103639747, 3552713678880267372432493847753987, 211758236813575107295480170109084902352995775163267
OFFSET
1,1
LINKS
FORMULA
a(n) = A074507(A076515(n)). - Amiram Eldar, Aug 11 2024
MATHEMATICA
Do[s=1^w+3^w+5^w; If[IntegerQ[w/100], Print[{w}]]; If[PrimeQ[s], Print[{w, s}]], {w, 0, 1000}]
PROG
(PARI) lista(kmax) = {my(p); for(k = 0, kmax, p = 1 + 3^k + 5^k; if(isprime(p), print1(p, ", "))); } \\ Amiram Eldar, Aug 11 2024
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Apr 15 2003
STATUS
approved