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 A093012 Numbers k such that prime(k) == 3 (mod 16). 4
 2, 8, 19, 23, 32, 38, 41, 47, 49, 63, 81, 91, 95, 101, 103, 117, 120, 125, 131, 138, 153, 161, 182, 188, 193, 195, 208, 225, 232, 241, 248, 256, 262, 266, 272, 280, 292, 300, 304, 314, 317, 321, 327, 334, 346, 351, 365, 370, 376, 385, 394, 409, 410, 414, 427 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A091968 indexed by A000040. The asymptotic density of this sequence is 1/8 (by Dirichlet's theorem). - Amiram Eldar, Mar 01 2021 LINKS G. C. Greubel, Table of n, a(n) for n = 1..5000 FORMULA A000040(a(n)) = A091968(n). a(n) = A000720(A091968(n)). MATHEMATICA Select[Range[430], Mod[Prime[ # ], 16] == 3 &] (* Ray Chandler, Nov 06 2006 *) PROG (Magma) [n: n in [1..450]|(NthPrime(n) mod 16) eq 3] // G. C. Greubel, Feb 05 2019 (PARI) {isok(n) = Mod(prime(n), 16)==3}; for(n=1, 450, if(isok(n)==1, print1(n, ", "), 0)) \\ G. C. Greubel, Feb 05 2019 CROSSREFS Cf. A000040, A000720, A091968, A092022. Sequence in context: A183183 A072675 A033711 * A049525 A286263 A236327 Adjacent sequences: A093009 A093010 A093011 * A093013 A093014 A093015 KEYWORD nonn AUTHOR Ray Chandler, Mar 15 2004, revised Nov 06 2006 STATUS approved

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Last modified May 19 11:36 EDT 2024. Contains 372683 sequences. (Running on oeis4.)