A155802 - OEIS

A155802

Numbers k such that (5^k + 2^k - 1)/12 is prime.

3, 5, 7, 15, 65, 105, 135, 155, 235, 249, 1407, 1745, 30207, 40407, 68115

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

Corresponding primes are: 11, 263, 6521, 2543134241, 225875452601146757084886003255695202165296363, 2054325274013051576593043138757255806440645138498014683534338706479543763.

Other terms are too large to be presented.

CROSSREFS

Cf. A155588.

Sequence in context: A334084 A050553 A005540 * A080741 A382705 A247356

Adjacent sequences: A155799 A155800 A155801 * A155803 A155804 A155805

KEYWORD

nonn,more

AUTHOR

Zak Seidov, Jan 27 2009

EXTENSIONS

a(11)-a(15) from Michael S. Branicky, Jul 08 2025

STATUS

approved