A167472 Primes p such that (p reversed) +6 is a square.

3, 877, 3049, 3631, 4951, 4999, 5197, 5743, 8101, 8377, 9103, 9109, 9127, 34273, 36721, 36781, 36943, 36979, 38671, 49069, 49993, 51769, 53437, 55171, 55987, 59509, 81817, 81931, 87277, 87613, 89119, 91243, 300499, 304021, 306421

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..640

Example

877->778+6=28^2; 8101->1018+6=32^2; 3049->9403+6=97^2.

Mathematica

Select[Prime[Range[30000]], IntegerQ[Sqrt[FromDigits[Reverse[ IntegerDigits[#]]] + 6]]&] (* Vincenzo Librandi, Sep 15 2013 *)

Prog

(Magma) [p: p in PrimesInInterval(2, 350000) | IsSquare(q+6) where q is Seqint(Reverse(Intseq(p)))]; // Vincenzo Librandi, Sep 15 2013

Crossrefs

Sequence in context: A163430 A203688 A253578 * A199040 A094592 A210768

Adjacent sequences: A167469 A167470 A167471 * A167473 A167474 A167475

Keyword

nonn,base,less

Author

Vincenzo Librandi, Nov 04 2009

Status

approved