Number of 6-step S, E, and NW-moving king's tours on an n X n board summed over all starting positions.

A187511

Number of 6-step S, E, and NW-moving king's tours on an n X n board summed over all starting positions.

Terms

    a(0) =0a(1) =0a(2) =36a(3) =272a(4) =772a(5) =1525a(6) =2524a(7) =3769a(8) =5260a(9) =6997a(10) =8980a(11) =11209a(12) =13684a(13) =16405a(14) =19372a(15) =22585a(16) =26044a(17) =29749a(18) =33700a(19) =37897a(20) =42340a(21) =47029a(22) =51964a(23) =57145a(24) =62572a(25) =68245a(26) =74164a(27) =80329a(28) =86740a(29) =93397

External references