Number of nX5 0..2 arrays x(i,j) with each element horizontally or vertically 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.
A230816
Number of nX5 0..2 arrays x(i,j) with each element horizontally or vertically 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) =2a(2) =100a(3) =816a(4) =28772a(5) =497166a(6) =10872238a(7) =222626294a(8) =4556094076a(9) =94532505000
External references
- oeis: A230816