T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock the same.

A205909

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock the same.

Terms

    a(0) =81a(1) =369a(2) =369a(3) =1764a(4) =2943a(5) =1764a(6) =8655a(7) =24045a(8) =24045a(9) =8655a(10) =43155a(11) =201324a(12) =327501a(13) =201324a(14) =43155a(15) =218034a(16) =1712907a(17) =4541781a(18) =4541781a(19) =1712907a(20) =218034a(21) =1112664a(22) =14747754a(23) =63696738a(24) =103275303a(25) =63696738a(26) =14747754a(27) =1112664a(28) =5722236a(29) =128014116

External references