A225590 - OEIS

A225590

Primes p such that A217015(p) is a prime number. That is, when applying the walk of a square spiral to the data of rotated-square spiral, on step p a prime number is hit.

%I #25 May 16 2013 12:56:58

%S 2,11,17,23,53,61,67,139,149,151,163,251,263,269,281,397,421,431,541,

%T 547,557,607,619,743,773,809,1021,1039,1229,1279,1291,1303,1361,1553,

%U 1601,1619,1637,1871,1901,1949,2003,2239,2251,2267,2281,2287,2309,2311,2347,2381,2393

%N Primes p such that A217015(p) is a prime number. That is, when applying the walk of a square spiral to the data of rotated-square spiral, on step p a prime number is hit.

%C Corresponding primes with prime indices, in sorted order: A225754.

%Y Cf. A217015, A217296, A215468, A214526, A225754.

%K nonn

%O 1,1

%A _Alex Ratushnyak_, May 15 2013