A112648 Integers k for which the k-th Mersenne prime exponent is a Gaussian prime (3 mod 4).

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

Offset: 1

Author

Jorge Coveiro, Dec 27 2005

Keywords

• nonn

Examples

			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.
		

Crossrefs

Cf. A000043, A112633, A112634, A112649.

Programs

Mathematica

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

Extensions

Edited by Don Reble, Jan 25 2006

More terms from Gord Palameta, Jul 21 2018