Number of defective 3-colorings of an n X 3 0..2 array connected horizontally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..2 order.
A229581
Number of defective 3-colorings of an n X 3 0..2 array connected horizontally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..2 order.
Terms
- a(0) =2a(1) =28a(2) =264a(3) =2160a(4) =16416a(5) =119232a(6) =839808a(7) =5785344a(8) =39191040a(9) =262020096a(10) =1733363712a(11) =11367641088a(12) =74010599424a(13) =478892113920
External references
- oeis: A229581