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A309142 Rank of elliptic curve y^2 = x^3 + (n^2 - 6*n -3)*x^2 + 16*n*x. 2
0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 2, 1, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

10,65

COMMENTS

a(n) is undefined for n = 0, 1 or 9.

LINKS

Table of n, a(n) for n=10..100.

Allan J. MacLeod, Knight's Problem

PROG

(PARI) {a(n) = ellanalyticrank(ellinit([0, n^2-6*n-3, 0, 16*n, 0]))[1]}

CROSSREFS

Cf. A085514, A086446, A309143, A309144, A309146.

Sequence in context: A316868 A106822 A203905 * A064532 A321922 A287146

Adjacent sequences:  A309139 A309140 A309141 * A309143 A309144 A309145

KEYWORD

nonn

AUTHOR

Seiichi Manyama, Jul 14 2019

STATUS

approved

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Last modified November 11 22:31 EST 2019. Contains 329046 sequences. (Running on oeis4.)