Number of ways to place 5 nonattacking kings on an n X n toroidal board.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =10a(5) =14940a(6) =229908a(7) =1678336a(8) =8155404a(9) =30614620a(10) =96011322a(11) =263506752a(12) =652150382a(13) =1485650012a(14) =3161648520a(15) =6355083264a(16) =12167739256a(17) =22339050588a(18) =39536586430a(19) =67748508480a(20) =112804636266a(21) =183057635420a(22) =290261282204a(23) =450688785408a(24) =686540794500