Number of ways to place 8 nonattacking kings on an 8 X n board.
A172261
Number of ways to place 8 nonattacking kings on an 8 X n board.
Terms
- a(0) =0a(1) =0a(2) =25a(3) =1847a(4) =162531a(5) =2501726a(6) =21243084a(7) =119138166a(8) =502726650a(9) =1724809105a(10) =5059647669a(11) =13132889249a(12) =30905051345a(13) =67124176002a(14) =136380034610a(15) =261909043488a(16) =479315827404a(17) =841394145399
External references
- oeis: A172261