Number of defective 3-colorings of an n X 2 0..2 array connected diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order.
A229679
Number of defective 3-colorings of an n X 2 0..2 array connected diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order.
Terms
- a(0) =0a(1) =2a(2) =36a(3) =360a(4) =2688a(5) =17280a(6) =101376a(7) =559104a(8) =2949120a(9) =15040512a(10) =74711040a(11) =363331584a(12) =1736441856a(13) =8178892800a(14) =38050725888a(15) =175154135040a(16) =798863917056
External references
- oeis: A229679