Number of closed walks on C_5 tensor J_2.

Terms

a(0) =1a(1) =0a(2) =4a(3) =0a(4) =48a(5) =32a(6) =640a(7) =896a(8) =8960a(9) =18432a(10) =130048a(11) =337920a(12) =1941504a(13) =5857280a(14) =29605888a(15) =98435072a(16) =458424320a(17) =1624375296a(18) =7174881280a(19) =26507476992a(20) =113123524608a(21) =429538672640