T(n,k)=Number of nXk 0..2 arrays x(i,j) with each element horizontally, vertically or antidiagonally 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.
A231031
T(n,k)=Number of nXk 0..2 arrays x(i,j) with each element horizontally, vertically or antidiagonally 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) =2a(5) =0a(6) =0a(7) =12a(8) =12a(9) =0a(10) =0a(11) =62a(12) =60a(13) =62a(14) =0a(15) =0a(16) =344a(17) =1074a(18) =1074a(19) =344a(20) =0a(21) =0a(22) =1864a(23) =12400a(24) =43566a(25) =12400a(26) =1864a(27) =0a(28) =0a(29) =10162
External references
- oeis: A231031