Number of (n+1) X (3+1) 0..1 arrays with each 2 X 2 subblock having clockwise pattern 0000 0011 or 0111.
A259245
Number of (n+1) X (3+1) 0..1 arrays with each 2 X 2 subblock having clockwise pattern 0000 0011 or 0111.
Terms
- a(0) =48a(1) =192a(2) =720a(3) =2816a(4) =10720a(5) =41552a(6) =159168a(7) =614560a(8) =2360464a(9) =9098240a(10) =34986848a(11) =134750672a(12) =518448960a(13) =1996103456a(14) =7681731600a(15) =29571245952a(16) =113812664288a(17) =438098128720
External references
- oeis: A259245