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Numbers k such that 2*k^2 +29 is composite.
(Formerly M5205)
3

%I M5205 #17 Apr 15 2022 11:22:46

%S 29,30,32,35,39,44,50,57,58,61,63,65,72,74,76,84,87,88,89,91,92,94,95,

%T 97,99,102,107,109,113,116,118,120,122,123,125,126,127,134,138,144,

%U 145,146,147,148,149,150,153,154,156,157,163,164,165,166,169,174,175,179,180,182,183,185,187

%N Numbers k such that 2*k^2 +29 is composite.

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%o (PARI) isok(k) = !isprime(2*k^2+29); \\ _Michel Marcus_, Apr 15 2022

%K nonn

%O 1,1

%A _N. J. A. Sloane_, _Mira Bernstein_, _Robert G. Wilson v_

%E More terms from _Michel Marcus_, Apr 15 2022