Coefficients of J(0)*theta_3(z) where J(0) is sequence A056945.

Terms

a(0) =1a(1) =2a(2) =0a(3) =-4a(4) =0a(5) =12a(6) =0a(7) =32728a(8) =196560a(9) =262154a(10) =0a(11) =3734484a(12) =16773120a(13) =18345916a(14) =0a(15) =103029576a(16) =398034000a(17) =376741188a(18) =0a(19) =1334312620a(20) =4629381120a(21) =3937755904a(22) =0a(23) =10792611336a(24) =34417656000a(25) =26962933262a(26) =0a(27) =62783799320a(28) =187489935360a(29) =138065611740