Number of nX3 0..3 arrays avoiding 11 horizontally, 22 vertically, 33 antidiagonally and 00 diagonally.
A229407
Number of nX3 0..3 arrays avoiding 11 horizontally, 22 vertically, 33 antidiagonally and 00 diagonally.
Terms
- a(0) =57a(1) =1756a(2) =53538a(3) =1629298a(4) =49788258a(5) =1519840402a(6) =46408035676
External references
- oeis: A229407