Expansion of k/(4*q^(1/2)) in powers of q, where k defined by sqrt(k) = theta_2(0, q)/theta_3(0, q).

A001938

Expansion of k/(4*q^(1/2)) in powers of q, where k defined by sqrt(k) = theta_2(0, q)/theta_3(0, q).

Terms

    a(0) =1a(1) =-4a(2) =14a(3) =-40a(4) =101a(5) =-236a(6) =518a(7) =-1080a(8) =2162a(9) =-4180a(10) =7840a(11) =-14328a(12) =25591a(13) =-44776a(14) =76918a(15) =-129952a(16) =216240a(17) =-354864a(18) =574958a(19) =-920600a(20) =1457946a(21) =-2285452a(22) =3548550a(23) =-5460592a(24) =8332425a(25) =-12614088a(26) =18953310a(27) =-28276968a(28) =41904208a(29) =-61702876

External references