T(n,k)=Number of nXk 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 3 and at least one element with value (x(i,j)-1) mod 3, and upper left element zero.
A230819
T(n,k)=Number of nXk 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 3 and at least one element with value (x(i,j)-1) mod 3, and upper left element zero.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =2a(8) =2a(9) =0a(10) =0a(11) =0a(12) =4a(13) =0a(14) =0a(15) =0a(16) =2a(17) =12a(18) =12a(19) =2a(20) =0a(21) =0a(22) =12a(23) =100a(24) =174a(25) =100a(26) =12a(27) =0a(28) =0a(29) =18
External references
- oeis: A230819