Number of ways to place 8 nonattacking amazons (superqueens) on an 8 X n board.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =32a(10) =552a(11) =4738a(12) =27110a(13) =119602a(14) =437640a(15) =1376504a(16) =3835578a(17) =9697416a(18) =22605024a(19) =49208658a(20) =101004522a(21) =197024206a(22) =367556982a(23) =659230078a(24) =1141734758a(25) =1916570390a(26) =3128196492a(27) =4978021504a(28) =7741704218a(29) =11790289180