A248344 Primes of the form x^2 - 2^y.

2, 3, 5, 7, 17, 23, 41, 47, 73, 79, 89, 97, 113, 137, 167, 193, 223, 233, 257, 281, 313, 353, 359, 401, 409, 433, 439, 449, 457, 521, 577, 593, 601, 617, 727, 761, 809, 839, 857, 929, 953, 977, 1009, 1087, 1097, 1193, 1201, 1217, 1223, 1361, 1367, 1433, 1489, 1553, 1609, 1697, 1721

Offset: 1

Author

Juri-Stepan Gerasimov, Oct 05 2014

Keywords

• nonn

Comments

Primes in A051204.

Examples

			17 is in this sequence because 17 = 5^2 - 2^3 = 7^2 - 2^5 = 9^2 - 2^6 = 23^2 - 2^9.
		

Crossrefs

Cf. A051204, A247763.

Extensions

a(54) corrected by Charles R Greathouse IV, Nov 26 2014