

A112648


Integers k for which the kth Mersenne prime exponent is a Gaussian prime (3 mod 4).


1



2, 4, 7, 8, 11, 12, 14, 15, 16, 20, 28, 29, 31, 32, 34, 40, 41, 42, 45
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OFFSET

1,1


LINKS



EXAMPLE

A000043(45) = 37156667 is congruent to 3 mod 4, so 45 is in this sequence.
A000043(46) = 42643801 is congruent to 1 mod 4, so 46 is not in this sequence.


MATHEMATICA

Select[Range@ 45, Mod[MersennePrimeExponent@ #, 4] == 3 &] (* Michael De Vlieger, Jul 22 2018 *)


CROSSREFS



KEYWORD

nonn


AUTHOR



EXTENSIONS



STATUS

approved



