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%I #7 Jul 14 2019 11:56:42
%S 2,11,74,854
%N Least k such that the rank of the elliptic curve y^2 = x^3 + (k^2 - 6*k - 3)*x^2 + 16*k*x is n.
%H Allan J. MacLeod, <a href="http://web.archive.org/web/20100125135648/http://maths.paisley.ac.uk/allanm/ECRNT/knight/knintro.htm">Knight's Problem</a>
%Y Cf. A309142, A309147.
%K nonn,more
%O 0,1
%A _Seiichi Manyama_, Jul 14 2019