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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
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
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.)