Number of nX3 array permutations with every element making zero or one right-handed knight moves (out 2, right 1).

A209538

Number of nX3 array permutations with every element making zero or one right-handed knight moves (out 2, right 1).

Terms

    a(0) =1a(1) =2a(2) =16a(3) =72a(4) =243a(5) =1125a(6) =5000a(7) =20480a(8) =86528a(9) =371293a(10) =1565109a(11) =6612354a(12) =28063056a(13) =118894600a(14) =503284375a(15) =2132531225a(16) =9034882704a(17) =38268370944a(18) =162106085376a(19) =686719856393

External references