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

A187513

Number of 8-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) =12a(3) =390a(4) =1910a(5) =4880a(6) =9250a(7) =14969a(8) =22026a(9) =30421a(10) =40154a(11) =51225a(12) =63634a(13) =77381a(14) =92466a(15) =108889a(16) =126650a(17) =145749a(18) =166186a(19) =187961a(20) =211074a(21) =235525a(22) =261314a(23) =288441a(24) =316906a(25) =346709a(26) =377850a(27) =410329a(28) =444146a(29) =479301

External references