Expansion of phi(-q^3) / phi(-q)^3 in powers of q where phi() is a Ramanujan theta function.

Terms

a(0) =1a(1) =6a(2) =24a(3) =78a(4) =222a(5) =576a(6) =1392a(7) =3180a(8) =6936a(9) =14550a(10) =29520a(11) =58176a(12) =111750a(13) =209820a(14) =385968a(15) =696960a(16) =1237470a(17) =2163456a(18) =3728904a(19) =6343068a(20) =10658880a(21) =17708412a(22) =29108880a(23) =47373696a(24) =76378992a(25) =122058870a(26) =193435248a(27) =304134558a(28) =474609180a(29) =735374016