Numerator of Kirchhoff index of ladder graph L_n.

Terms

a(0) =1a(1) =5a(2) =71a(3) =214a(4) =11725a(5) =6031a(6) =415177a(7) =140972a(8) =1305393a(9) =14793725a(10) =289997917a(11) =57882242a(12) =6527639365a(13) =7542845429a(14) =1833039251a(15) =19332937048a(17) =337099968813