A181570 Primes in A050798.

7, 13, 17, 23, 31, 37, 41, 53, 67, 89, 97, 103, 109, 113, 127, 137, 149, 151, 163, 167, 179, 197, 211, 223, 227, 229, 241, 263, 269, 277, 281, 283, 311, 331, 347, 359, 367, 373, 383, 389, 397, 419, 431, 433, 439, 479, 491, 503, 509, 541, 547, 587, 601, 617, 619, 653, 673, 677, 683, 691, 709

Offset

1,1

Comments

Primes p such that p^2 + 1 is expressible as the sum of two nonzero squares in exactly two ways.

Links

Table of n, a(n) for n=1..61.

Formula

A050798 INTERSECTION A000040. {p in A000040 such that A000161(p^2 + 1) = 2}.

Crossrefs

Cf. A000040, A000161, A050798.

Sequence in context: A288713 A136083 A167276 * A154408 A089531 A247010

Adjacent sequences: A181567 A181568 A181569 * A181571 A181572 A181573

Keyword

nonn,easy

Author

Jonathan Vos Post, Jan 29 2011

Status

approved