Number of Hamiltonian cycles in W_4 X P_n.

Terms

a(0) =1a(1) =10a(2) =46a(3) =238a(4) =1170a(5) =5882a(6) =29278a(7) =146382a(8) =730434a(9) =3647994a(10) =18212046a(11) =90936494a(12) =454029874a(13) =2266968122a(14) =11318785790a(15) =56514147406a(16) =282171551586