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

A187380

Number of 6-step 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) =24a(3) =264a(4) =832a(5) =1810a(6) =3154a(7) =4864a(8) =6940a(9) =9382a(10) =12190a(11) =15364a(12) =18904a(13) =22810a(14) =27082a(15) =31720a(16) =36724a(17) =42094a(18) =47830a(19) =53932a(20) =60400a(21) =67234a(22) =74434a(23) =82000a(24) =89932a(25) =98230a(26) =106894a(27) =115924a(28) =125320a(29) =135082

External references