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A155802
Numbers n with property that (5^n + 2^n - 1)/12 is prime.
0
3, 5, 7, 15, 65, 105, 135, 155, 235, 249
OFFSET
1,1
EXAMPLE
Corresponding primes are: 11, 263, 6521, 2543134241,
225875452601146757084886003255695202165296363,
2054325274013051576593043138757255806440645138498014683534338706479543763.
Other terms are too large to be presented.
CROSSREFS
Cf. A155588 5^n+2^n-1.
Sequence in context: A334084 A050553 A005540 * A080741 A247356 A291736
KEYWORD
nonn
AUTHOR
Zak Seidov, Jan 27 2009
STATUS
approved