Number of nX3 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.
A230783
Number of nX3 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) =86a(2) =3332a(3) =117372a(4) =4321988a(5) =159055144a(6) =5846988064a(7) =214974074284
External references
- oeis: A230783