T(n,k)=Number of nXk 0..3 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4 and at least one element with value (x(i,j)-1) mod 4, no adjacent elements equal, and upper left element zero.
A231049
T(n,k)=Number of nXk 0..3 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4 and at least one element with value (x(i,j)-1) mod 4, no adjacent elements equal, and upper left element zero.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =2a(5) =0a(6) =0a(7) =14a(8) =2a(9) =0a(10) =0a(11) =32a(12) =50a(13) =10a(14) =0a(15) =0a(16) =100a(17) =128a(18) =410a(19) =22a(20) =0a(21) =0a(22) =428a(23) =644a(24) =2080a(25) =2430a(26) =70a(27) =0a(28) =0a(29) =1616
External references
- oeis: A231049