Number of 4Xn 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value 2-x(i,j).
A230678
Number of 4Xn 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value 2-x(i,j).
Terms
- a(0) =0a(1) =423a(2) =17271a(3) =730503a(4) =37034355a(5) =1844154933a(6) =91258562955
External references
- oeis: A230678