Theta series of A_23 lattice.

Terms

a(0) =1a(1) =552a(2) =63756a(3) =2704064a(4) =53183682a(5) =567173376a(6) =3844954344a(7) =19344711936a(8) =78707396790a(9) =270865553048a(10) =819741312720