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%I #21 Jul 16 2019 02:51:22
%S 1,3,14,323,1918,195843
%N Smallest k>0 such that the elliptic curve y^2 = x^3 + k*x has rank n, if k exists.
%C See A309029 for the smallest negative k.
%H B. J. Birch and H. P. F. Swinnerton-Dyer, <a href="https://eudml.org/doc/150565">Notes on elliptic curves, I</a>, J. Reine Angew. Math., 212 (1963), 7-25.
%Y Cf. A031507, A060953, A194687, A309029.
%Y Cf. A002158, A002159, A076329, A309030, A309031, A309190.
%K nonn,more,hard
%O 0,2
%A _Seiichi Manyama_, Jul 08 2019
%E a(5) from _Vaclav Kotesovec_, Jul 14 2019
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