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

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =1974a(6) =42368a(7) =397014a(8) =2326320a(9) =10087628a(10) =35464464a(11) =106783320a(12) =285336128a(13) =693331146a(14) =1558986816a(15) =3286192514a(16) =6558317232a(17) =12488282352a(18) =22829958032a(19) =40269324564a(20) =68817690624a(21) =114333609854a(22) =185205015936