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
Keywords
Links
- Masao Koike, Modular forms on non-compact arithmetic triangle groups, Unpublished manuscript [Extensively annotated with OEIS A-numbers by N. J. A. Sloane, Feb 14 2021.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.]