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A138917
Primes of the form (7^n - 3^n)/4.
0
79, 205339, 2849723505777919, 32630698480032300363207829406924223200028691707999878933118763629424475875983590509549306981, 127580191747195202924309312459314208655999588495944426207896494224749946405733526219402133007132444053184501199
OFFSET
1,1
MATHEMATICA
a={}; Do[p=(7^n-3^n)/4; If[PrimeQ[p], AppendTo[a, p]], {n, 0, 13^2}]; a
CROSSREFS
Cf. A128024.
Sequence in context: A251365 A023343 A265465 * A265589 A116327 A060711
KEYWORD
nonn
AUTHOR
STATUS
approved