Number of spanning trees with degrees 1 and 3 in P_5 X P_n.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =296a(6) =0a(7) =0a(8) =0a(9) =70420a(10) =0a(11) =0a(12) =0a(13) =16391166a(14) =0a(15) =0a(16) =0a(17) =3816021084a(18) =0a(19) =0a(20) =0a(21) =888375830566a(22) =0a(23) =0a(24) =0a(26) =0a(27) =0a(28) =0a(30) =0a(31) =0