A068713 Numbers k for which 10*2^k + 3 is a prime (giving terms of A068712).

0, 1, 2, 3, 4, 6, 7, 10, 11, 17, 19, 25, 27, 31, 33, 42, 43, 49, 51, 57, 64, 65, 106, 139, 196, 273, 279, 379, 392, 505, 663, 737, 874, 943, 1015, 1546, 1547, 1686, 3937, 4065, 5164, 6257, 6401, 7066, 7412, 7966, 9440, 9921, 11105, 15076, 15547, 22646, 24779

Offset: 1

Author

Amarnath Murthy, Mar 05 2002

Keywords

• nonn

Crossrefs

Cf. A068712.

Programs

Mathematica

Select[Range[0,4100], PrimeQ[10*2^#+3] &] (* Jayanta Basu, May 22 2013 *)

Extensions

More terms from Sascha Kurz, Mar 17 2002

Extended by Charles R Greathouse IV, Apr 24 2010

Offset 1 from Michel Marcus, Jan 10 2023