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A221705 Coefficients in q-expansion of modular form (of weight 2 and level 800) associated with the curve y^2 = x^3 - 25x. 2
1, 0, -3, -6, -2, 0, 0, -10, 0, 2, 10, 0, -7, -14, 0, -10, 0, 0, 6, 0, 9, 0, 10, 0, -18, -2, 0, 6, 14, 18, -11, 0, 0, 0, 22, 0, 0, 14, 6, -22, 0, 0, 23, 26, 0, -18, 0, 0, 14, 2, 0, 0, 0, 0, 0, 12, 0, 30, -26, 0, -30, 0, 0, 0, -2, 30, 0, -26, 0, 18, 10, 0, -13, 34, 0, 0, 0, 0, -26, -22 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
COMMENTS
See A221702, which is the main entry for this sequence.
LINKS
FORMULA
a(n) = A221702(4*n + 1).
PROG
(Sage)
def a(n):
E = EllipticCurve([-25, 0])
return E.an(4*n+1) # Robin Visser, Jul 22 2023
CROSSREFS
Cf. A221702.
Sequence in context: A335227 A094445 A004158 * A332505 A303864 A058178
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Jan 22 2013
EXTENSIONS
More terms from Robin Visser, Jul 22 2023
STATUS
approved

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Last modified March 29 04:59 EDT 2024. Contains 371264 sequences. (Running on oeis4.)