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 A256172 Primes of the form 6*p + 1 with p prime that are also of the form x^2 + 27*y^2 and congruent to 7 mod 24. 0
 31, 223, 439, 1399, 2383, 2767, 3343, 3463, 3607, 4567, 6079, 7927, 8167, 8287, 8719, 10159, 10663, 11959, 14503, 15559, 15727, 17383, 18223, 19087, 20743, 21487, 21559, 24007, 25639, 26647, 27103, 27583, 28807, 28879, 29167, 29599, 31183, 32359, 33343 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(n) divides 2^m - 1, where m = (a(n) - 7)/6 + 1. LINKS Table of n, a(n) for n=1..39. FORMULA A014752 INTERSECT A051644 INTERSECT A107006. CROSSREFS Subsequence of A122094. Cf. A014752, A051644, A107006. Sequence in context: A042874 A221448 A001136 * A142939 A229018 A036335 Adjacent sequences: A256169 A256170 A256171 * A256173 A256174 A256175 KEYWORD nonn AUTHOR Arkadiusz Wesolowski, Jun 01 2015 STATUS approved

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Last modified July 16 10:51 EDT 2024. Contains 374345 sequences. (Running on oeis4.)