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A221702
q-expansion of modular form (of weight 2 and level 800) associated with the curve y^2 = x^3 - 25x.
2
0, 1, 0, 0, 0, 0, 0, 0, 0, -3, 0, 0, 0, -6, 0, 0, 0, -2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -10, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 10, 0, 0, 0, 0, 0, 0, 0, -7, 0, 0, 0, -14, 0, 0, 0, 0, 0, 0, 0, -10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 0, 9, 0, 0, 0, 0, 0, 0, 0, 10
OFFSET
0,10
LINKS
EXAMPLE
q - 3*q^9 - 6*q^13 - 2*q^17 - 10*q^29 + 2*q^37 + 10*q^41 - 7*q^49 + ...
PROG
(Sage)
def a(n):
E = EllipticCurve([-25, 0])
return E.an(n) # Robin Visser, Jul 22 2023
CROSSREFS
See A221705 for another version.
Sequence in context: A333784 A181189 A327889 * A084681 A261038 A370108
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Jan 22 2013
EXTENSIONS
More terms from Robin Visser, Jul 22 2023
STATUS
approved