Number of 2 X n 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, diagonally or antidiagonally, and top left element zero.
A232956
Number of 2 X n 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, diagonally or antidiagonally, and top left element zero.
Terms
- a(0) =4a(1) =21a(2) =129a(3) =771a(4) =4629a(5) =27771a(6) =166629a(7) =999771a(8) =5998629a(9) =35991771a(10) =215950629a(11) =1295703771a(12) =7774222629a(13) =46645335771a(14) =279872014629
External references
- oeis: A232956