Number of defective 4-colorings of an n X 3 0..3 array connected horizontally, antidiagonally and vertically with exactly one mistake, and colors introduced in row-major 0..3 order.
A229474
Number of defective 4-colorings of an n X 3 0..3 array connected horizontally, antidiagonally and vertically with exactly one mistake, and colors introduced in row-major 0..3 order.
Terms
- a(0) =2a(1) =42a(2) =420a(3) =3328a(4) =23964a(5) =163528a(6) =1077588a(7) =6927888a(8) =43728652a(9) =272112472a(10) =1674170052a(11) =10205294240a(12) =61731029116a(13) =370982129640
External references
- oeis: A229474