Number of ways to place 5 nonattacking amazons (superqueens) on a 5 X n board.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =4a(8) =40a(9) =204a(10) =708a(11) =1968a(12) =4712a(13) =10064a(14) =19656a(15) =35744a(16) =61328a(17) =100272a(18) =157424a(19) =238736a(20) =351384a(21) =503888a(22) =706232a(23) =969984a(24) =1308416a(25) =1736624a(26) =2271648a(27) =2932592a(28) =3740744a(29) =4719696