Number of n X 2 0..3 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, and upper left element zero.
A230782
Number of n X 2 0..3 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, and upper left element zero.
Terms
- a(0) =0a(1) =6a(2) =86a(3) =820a(4) =8154a(5) =82576a(6) =833986a(7) =8417644a(8) =84971714a(9) =857764344a(10) =8658840234a(11) =87407976260a(12) =882353220314
External references
- oeis: A230782