Number of 9-step S, E, and NW-moving king's tours on an n X n board summed over all starting positions.

A187514

Number of 9-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) =6a(3) =450a(4) =2872a(5) =8522a(6) =17564a(7) =29834a(8) =45255a(9) =63814a(10) =85511a(11) =110346a(12) =138319a(13) =169430a(14) =203679a(15) =241066a(16) =281591a(17) =325254a(18) =372055a(19) =421994a(20) =475071a(21) =531286a(22) =590639a(23) =653130a(24) =718759a(25) =787526a(26) =859431a(27) =934474a(28) =1012655a(29) =1093974

External references