Coefficients of Legendre polynomials.

Terms

a(0) =1a(1) =1a(2) =9a(3) =50a(4) =1225a(5) =7938a(6) =106722a(7) =736164a(8) =41409225a(9) =295488050a(10) =4266847442a(11) =31102144164a(12) =914057459042