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

1,1

Links

Table of n, a(n) for n=1..27.

Example

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

Prog

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

Crossrefs

Subsequence of A228244.

Sequence in context: A355465 A134360 A171687 * A110915 A068733 A066161

Adjacent sequences: A178047 A178048 A178049 * A178051 A178052 A178053

Keyword

nonn

Author

John L. Drost, Dec 16 2010

Extensions

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

Status

approved