465654domain: NAppears in sequencesa(n) = T(2n, n-2), T given by A026769.at n=7A026772G.f. A(x) satisfies: A(x) = Product_{n>=0} (1-x^(5*n+1)*A(x)) * (1-x^(5*n+4)*A(x)) / ( (1-x^(5*n+2)*A(x)) * (1-x^(5*n+3)*A(x)) ).at n=18A341960