Triangle read by rows: T(n,k) = number of ways to place k nonattacking kings on an n X n board.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =1a(6) =9a(7) =16a(8) =8a(9) =1a(10) =1a(11) =16a(12) =78a(13) =140a(14) =79a(15) =1a(16) =25a(17) =228a(18) =964a(19) =1987a(20) =1974a(21) =978a(22) =242a(23) =27a(24) =1a(25) =1a(26) =36a(27) =520a(28) =3920a(29) =16834