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%I #10 Jul 22 2023 12:12:58
%S 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,
%T 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,
%U 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
%N Coefficients in q-expansion of modular form (of weight 2 and level 800) associated with the curve y^2 = x^3 - 25x.
%C See A221702, which is the main entry for this sequence.
%H Robin Visser, <a href="/A221705/b221705.txt">Table of n, a(n) for n = 0..10000</a>
%F a(n) = A221702(4*n + 1).
%o (Sage)
%o def a(n):
%o E = EllipticCurve([-25, 0])
%o return E.an(4*n+1) # _Robin Visser_, Jul 22 2023
%Y Cf. A221702.
%K sign
%O 0,3
%A _N. J. A. Sloane_, Jan 22 2013
%E More terms from _Robin Visser_, Jul 22 2023
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