A198948 Expansion of modular form (E6(q)+8*E6(q^2))/9, where E6 = A013973.

1, -56, -2296, -13664, -73976, -175056, -560224, -941248, -2367736, -3320408, -7177296, -9018912, -18050144, -20792464, -38591168, -42713664, -75768056, -79512048, -136136728, -138661600, -231248976, -229664512, -369775392, -360435264, -577727584, -547050056, -852491024, -806859200, -1243388608, -1148624400, -1751260224, -1603232512

Offset

0,2

Links

Table of n, a(n) for n=0..31.

Masao Koike, Modular forms on non-compact arithmetic triangle groups, Unpublished manuscript [Extensively annotated with OEIS A-numbers by N. J. A. Sloane, Feb 14 2021. I wrote 2005 on the first page but the internal evidence suggests 1997.]

Crossrefs

Sequence in context: A221398 A280803 A124101 * A003696 A199709 A205227

Adjacent sequences: A198945 A198946 A198947 * A198949 A198950 A198951

Keyword

sign

Author

N. J. A. Sloane, Oct 31 2011

Status

approved