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

1,3

Links

Table of n, a(n) for n=1..53.

Mathematica

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

Crossrefs

Cf. A068712.

Sequence in context: A134519 A101505 A259625 * A218549 A354970 A099523

Adjacent sequences: A068710 A068711 A068712 * A068714 A068715 A068716

Keyword

nonn

Author

Amarnath Murthy, Mar 05 2002

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

Status

approved