Number of defective 4-colorings of an n X 7 0..3 array connected horizontally, vertically, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..3 order.
A229754
Number of defective 4-colorings of an n X 7 0..3 array connected horizontally, vertically, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..3 order.
Terms
- a(0) =210a(1) =20032a(2) =41872a(3) =69198a(4) =113330a(5) =186396a(6) =314700a(7) =557578a(8) =1046550a(9) =2070144a(10) =4258696a(11) =8984046a(12) =19221426a(13) =41402836a(14) =89392212a(15) =192991026a(16) =416096878a(17) =895389192a(18) =1922585088a(19) =4119014998a(20) =8805491466a(21) =18784661532a(22) =39993300364
External references
- oeis: A229754