Number of 6-cycles in the n X n knight graph.

Terms

a(0) =0a(1) =0a(2) =0a(3) =20a(4) =164a(5) =616a(6) =1348a(7) =2352a(8) =3628a(9) =5176a(10) =6996a(11) =9088a(12) =11452a(13) =14088a(14) =16996a(15) =20176a(16) =23628a(17) =27352a(18) =31348a(19) =35616a(20) =40156a(21) =44968a(22) =50052a(23) =55408a(24) =61036a(25) =66936a(26) =73108a(27) =79552a(28) =86268a(29) =93256