Number of 8-step E, S, NW and NE-moving king's tours on an n X n board summed over all starting positions.

A187591

Number of 8-step E, S, NW and NE-moving king's tours on an n X n board summed over all starting positions.

Terms

    a(0) =0a(1) =0a(2) =34a(3) =2309a(4) =15056a(5) =45718a(6) =95776a(7) =164135a(8) =250132a(9) =353767a(10) =475040a(11) =613951a(12) =770500a(13) =944687a(14) =1136512a(15) =1345975a(16) =1573076a(17) =1817815a(18) =2080192a(19) =2360207a(20) =2657860a(21) =2973151a(22) =3306080a(23) =3656647a(24) =4024852a(25) =4410695a(26) =4814176a(27) =5235295a(28) =5674052a(29) =6130447

External references