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A309147 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. 1
1, 4, 28, 356 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..3.

Allan J. MacLeod, Knight's Problem

PROG

(PARI) {a(n) = my(k=1); while(ellanalyticrank(ellinit([0, k^2+6*k-3, 0, -16*k, 0]))[1]<>n, k++); k}

CROSSREFS

Cf. A309144, A309146.

Sequence in context: A140425 A193198 A165193 * A217903 A339283 A095288

Adjacent sequences:  A309144 A309145 A309146 * A309148 A309149 A309150

KEYWORD

nonn,more,hard

AUTHOR

Seiichi Manyama, Jul 14 2019

STATUS

approved

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Last modified June 12 16:55 EDT 2021. Contains 344959 sequences. (Running on oeis4.)