Number of n X 3 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 or 2 neighboring 1s.
A297309
Number of n X 3 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 or 2 neighboring 1s.
Terms
- a(0) =4a(1) =23a(2) =117a(3) =609a(4) =3159a(5) =16389a(6) =85041a(7) =441225a(8) =2289339a(9) =11878281a(10) =61631001a(11) =319774761a(12) =1659164103a(13) =8608637997a(14) =44666257401a(15) =231752633913
External references
- oeis: A297309