Expansion of ((phi(q) * phi(-q^2)^2)^2 - 1) / 4 in powers of q where phi() is a Ramanujan theta function.
A138505
Expansion of ((phi(q) * phi(-q^2)^2)^2 - 1) / 4 in powers of q where phi() is a Ramanujan theta function.
Terms
- a(0) =1a(1) =-1a(2) =-8a(3) =-1a(4) =26a(5) =8a(6) =-48a(7) =-1a(8) =73a(9) =-26a(10) =-120a(11) =8a(12) =170a(13) =48a(14) =-208a(15) =-1a(16) =290a(17) =-73a(18) =-360a(19) =-26a(20) =384a(21) =120a(22) =-528a(23) =8a(24) =651a(25) =-170a(26) =-656a(27) =48a(28) =842a(29) =208
External references
- oeis: A138505