Number of (n+1) X (4+1) 0..1 arrays with each 2 X 2 subblock having clockwise pattern 0000 0011 or 0101.
A259218
Number of (n+1) X (4+1) 0..1 arrays with each 2 X 2 subblock having clockwise pattern 0000 0011 or 0101.
Terms
- a(0) =45a(1) =71a(2) =112a(3) =183a(4) =303a(5) =510a(6) =869a(7) =1499a(8) =2616a(9) =4619a(10) =8251a(11) =14910a(12) =27249a(13) =50343a(14) =93968a(15) =177071a(16) =336567a(17) =644702a(18) =1243405a(19) =2412387a(20) =4704360a(21) =9213891a(22) =18112547a(23) =35715038a(24) =70604793a(25) =139874255a(26) =277587904a(27) =551679879a(28) =1097703231a(29) =2186254014
External references
- oeis: A259218