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%I #23 Jul 12 2019 09:10:52
%S 1,2,17,82,5037,49042
%N Smallest k>0 such that the elliptic curve y^2 = x^3 - k*x has rank n, if k exists.
%C See A309028 for the smallest positive 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. A031508, A060952, A194687, A309028.
%Y Cf. A002156, A002157, A309032, A309033, A309034, A309100.
%K nonn,more,hard
%O 0,2
%A _Seiichi Manyama_, Jul 08 2019
%E a(5) from _Vaclav Kotesovec_, Jul 09 2019
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