A225754 Primes p such that A217296(p) is a prime number. That is, when applying the walk of rotated-square spiral to the data of square spiral, on step p a prime number is hit.

5, 11, 13, 29, 31, 41, 67, 71, 73, 79, 127, 137, 193, 199, 211, 293, 313, 421, 499, 503, 619, 631, 647, 661, 673, 773, 811, 967, 991, 1013, 1129, 1163, 1553, 1567, 1597, 1601, 1607, 1747, 1777, 1783, 1789, 1801, 1831, 1861, 1997, 2039, 2053, 2087, 2099, 2113, 2287, 2311

Offset

1,1

Comments

Corresponding primes with prime indices, in sorted order: A225590. The intersection of a(n) with A225590 begins: 11, 67, 421, 619, 773, 1553, 1601, 2287, 2311, 2381, 2609, 3169, 3181, 3491, 3511, 4157, 4597, 4639, 6263, 7129, 7177, 7193, 8291, 9277.

Links

Table of n, a(n) for n=1..52.

Crossrefs

Cf. A217015, A217296, A215468, A214526, A225590.

Sequence in context: A153120 A115782 A051654 * A098973 A125742 A269844

Adjacent sequences: A225751 A225752 A225753 * A225755 A225756 A225757

Keyword

nonn

Author

Alex Ratushnyak, May 15 2013

Status

approved