Number of 5-cycles in the n X n queen graph.

Terms

a(0) =0a(1) =0a(2) =376a(3) =4644a(4) =23920a(5) =81876a(6) =219384a(7) =499544a(8) =1014160a(9) =1885960a(10) =3280968a(11) =5402716a(12) =8516848a(13) =12929804a(14) =19034408a(15) =27263040a(16) =38165376a(17) =52323744a(18) =70476456a(19) =93380724a(20) =121997440a(21) =157284564a(22) =200461624a(23) =252714168a(24) =315558528a(25) =390435608a(26) =479198872a(27) =583573276a(28) =705791856a(29) =847893292