A178050 n=x^2+17, n and n+2 are prime.

17, 26261, 90017, 138401, 176417, 562517, 788561, 2022101, 2683061, 4743701, 5336117, 9622421, 11614481, 13927841, 21344417, 21734261, 22184117, 38192417, 59629301, 64448801, 68558417, 79923617, 82301201, 89302517, 90098081, 91814741, 95648417

Offset: 1

Author

John L. Drost, Dec 16 2010

Keywords

• nonn

Examples

			17=0^2+17, and 19 are prime.
26261=162^2+17 and 26263 are prime.
		

Crossrefs

Subsequence of A228244.

Programs

PARI

isok(n) = isprime(n) && isprime(n+2) && issquare(n-17); \\ Michel Marcus, Aug 18 2013

Extensions

a(26)-a(27) from Michel Marcus, Aug 18 2013