A371349 - cp's OEIS frontend

A371349 Odd addends k > 0 such that x^2 + x + k produces a new minimum of its Hardy-Littlewood Constant.

%I A371349 #7 Apr 11 2024 21:55:25
%S A371349 1,3,9,15,33,63,75,225,243,273,453,813,1275,1443,2763,3003,6693,9933,
%T A371349 10515
%N A371349 Odd addends k > 0 such that x^2 + x + k produces a new minimum of its Hardy-Littlewood Constant.
%H A371349 Martin Raab, <a href="https://www.mersenneforum.org/showpost.php?p=654692&amp;postcount=55">Post in thread Ponder This - March 2024</a>, at Mersenneforum.org, Apr 08 2024 (suggests this sequence).
%o A371349 (PARI) \\ Uses function HardyLittlewood2 from a221712.gp; see link in A331940
%o A371349 a371349(upto) = {my (Hmin=oo); forstep (k=1, upto, 2, my (H=HardyLittlewood2(x^2+x+k)); if (H<Hmin, print1(k,", "); Hmin=H))};
%o A371349 a371349(1500)
%Y A371349 Cf. A331940 for more information.
%K A371349 nonn,hard,more
%O A371349 1,2
%A A371349 _Hugo Pfoertner_, Apr 11 2024, suggested by _Martin Raab_

cp's OEIS Frontend

A371349 Odd addends k > 0 such that x^2 + x + k produces a new minimum of its Hardy-Littlewood Constant.