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

A206054

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

Terms

    a(0) =48a(1) =255a(2) =255a(3) =1338a(4) =2310a(5) =1338a(6) =7041a(7) =20400a(8) =20400a(9) =7041a(10) =37020a(11) =180195a(12) =295392a(13) =180195a(14) =37020a(15) =194691a(16) =1590378a(17) =4256868a(18) =4256868a(19) =1590378a(20) =194691a(21) =1023822a(22) =14037225a(23) =61165512a(24) =99399924a(25) =61165512a(26) =14037225a(27) =1023822a(28) =5384085a(29) =123893883

External references