Expansion of Sum_{0<i<j<k<l} q^(2*(i+j+k+l)-4)/( (1-q^(2*i-1))*(1-q^(2*j-1))*(1-q^(2*k-1))*(1-q^(2*l-1)) )^2.

A365666

Expansion of Sum_{0<i<j<k<l} q^(2*(i+j+k+l)-4)/( (1-q^(2*i-1))*(1-q^(2*j-1))*(1-q^(2*k-1))*(1-q^(2*l-1)) )^2.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =8a(4) =14a(5) =24a(6) =40a(7) =64a(8) =100a(9) =144a(10) =212a(11) =304a(12) =424a(13) =588a(14) =800a(15) =1072a(16) =1422a(17) =1864a(18) =2408a(19) =3080a(20) =3950a(21) =4972a(22) =6224a(23) =7760a(24) =9564a(25) =11742a(26) =14344a(27) =17384a(28) =20968a(29) =25204

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