Number of 3Xn 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero.
A230471
Number of 3Xn 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero.
Terms
- a(0) =0a(1) =2a(2) =114a(3) =2398a(4) =35052a(5) =552720a(6) =8724560a(7) =138661614a(8) =2199713318a(9) =34899147754a(10) =553614141632
External references
- oeis: A230471