Number of nX2 binary arrays without the pattern 1 0 0 1 diagonally, vertically, antidiagonally or horizontally.
A189336
Number of nX2 binary arrays without the pattern 1 0 0 1 diagonally, vertically, antidiagonally or horizontally.
Terms
- a(0) =4a(1) =16a(2) =64a(3) =225a(4) =784a(5) =2704a(6) =9409a(7) =32761a(8) =114244a(9) =398161a(10) =1387684a(11) =4835601a(12) =16851025a(13) =58721569a(14) =204633025a(15) =713103616a(16) =2485022500a(17) =8659791364a(18) =30177596089a(19) =105162706944a(20) =366470415424
External references
- oeis: A189336