Number of defective 3-colorings of an n X 2 0..2 array connected horizontally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..2 order.
A229580
Number of defective 3-colorings of an n X 2 0..2 array connected horizontally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..2 order.
Terms
- a(0) =1a(1) =6a(2) =40a(3) =224a(4) =1152a(5) =5632a(6) =26624a(7) =122880a(8) =557056a(9) =2490368a(10) =11010048a(11) =48234496a(12) =209715200a(13) =905969664a(14) =3892314112a(15) =16642998272a(16) =70866960384a(17) =300647710720
External references
- oeis: A229580