Expansion of q^(-1) * (phi(q) / phi(q^9) - 1) / 2 in powers of q^3 where phi() is a Ramanujan theta function.
A128111
Expansion of q^(-1) * (phi(q) / phi(q^9) - 1) / 2 in powers of q^3 where phi() is a Ramanujan theta function.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =-2a(4) =-2a(5) =1a(6) =4a(7) =4a(8) =-1a(9) =-8a(10) =-8a(11) =2a(12) =14a(13) =14a(14) =-4a(15) =-24a(16) =-23a(17) =6a(18) =40a(19) =38a(20) =-10a(21) =-63a(22) =-60a(23) =16a(24) =98a(25) =92a(26) =-24a(27) =-150a(28) =-140a(29) =36
External references
- oeis: A128111