Diagonal of rational function 1/(1 - (1 + x*y) * (x^3 + y^3)).

Terms

a(0) =1a(1) =0a(2) =0a(3) =2a(4) =4a(5) =2a(6) =6a(7) =24a(8) =36a(9) =44a(10) =126a(11) =300a(12) =470a(13) =860a(14) =2080a(15) =4192a(16) =7420a(17) =15260a(18) =33124a(19) =64568a(20) =124558a(21) =259632a(22) =535668a(23) =1055460a(24) =2118414a(25) =4373412a(26) =8872644a(27) =17765396a(28) =36138168a(29) =73972404