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%I #9 Jul 15 2019 15:38:12
%S 1,6,88,3630
%N Least k such that the rank of the elliptic curve y^2 = x * (x+1) * (x-k) is n.
%o (PARI) {a(n) = my(k=1); while(ellanalyticrank(ellinit([0, -k+1, 0, -k, 0]))[1]<>n, k++); k}
%Y Cf. A309163.
%K nonn,more
%O 0,2
%A _Seiichi Manyama_, Jul 15 2019
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