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 A120311 Numbers k such that pi(k) == 0 (mod 4), where pi() = A000720, and such that prime(k) == 3 (mod 4). 0
 8, 9, 19, 20, 22, 38, 39, 54, 56, 58, 72, 90, 91, 92, 93, 94, 95, 96, 107, 131, 132, 133, 153, 154, 155, 156, 173, 175, 177, 193, 195, 224, 225, 239, 240, 266, 281, 282, 311, 340, 344, 346, 360, 363, 364, 365, 383, 385, 386, 387 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..50. MATHEMATICA a = Flatten[Table[If[Mod[PrimePi[n], 4] == 0&& Mod[Prime[n], 4] -3 == 0, n, {}], {n, 1, 200}]] Select[Range[400], Mod[PrimePi[#], 4]==0&&Mod[Prime[#], 4]==3&] (* Harvey P. Dale, Apr 17 2019 *) CROSSREFS Cf. A000720. Intersection of A080148 and A120309. Sequence in context: A374118 A067544 A022313 * A061414 A240915 A281225 Adjacent sequences: A120308 A120309 A120310 * A120312 A120313 A120314 KEYWORD nonn AUTHOR Roger L. Bagula, Jun 20 2006 EXTENSIONS Edited and more terms added by Michel Marcus, Jun 01 2013 Offset corrected by Michel Marcus, Feb 10 2021 STATUS approved

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Last modified July 21 22:43 EDT 2024. Contains 374478 sequences. (Running on oeis4.)