Number of closed walks of length 16 and algebraic area n in the square lattice.

Terms

a(0) =33820044a(1) =28133728a(2) =18569808a(3) =10127744a(4) =5015108a(5) =2289760a(6) =1036368a(7) =435040a(8) =184104a(9) =73056a(10) =28064a(11) =10336a(12) =3760a(13) =1088a(14) =352a(15) =96a(16) =16a(17) =0a(18) =0a(19) =0a(20) =0a(21) =0a(22) =0a(23) =0a(24) =0a(25) =0a(26) =0a(27) =0a(28) =0a(29) =0