Number of defective 4-colorings of an n X 7 0..3 array connected horizontally, antidiagonally and vertically with exactly two mistakes, and colors introduced in row-major 0..3 order.
A229671
Number of defective 4-colorings of an n X 7 0..3 array connected horizontally, antidiagonally and vertically with exactly two mistakes, and colors introduced in row-major 0..3 order.
Terms
- a(0) =210a(1) =197248a(2) =13271403a(3) =557478448a(4) =19833096240a(5) =649844491552
External references
- oeis: A229671