1/16 the number of (n+1) X 3 binary arrays with no 2 X 2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor.
A183804
1/16 the number of (n+1) X 3 binary arrays with no 2 X 2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor.
Terms
- a(0) =3a(1) =13a(2) =55a(3) =237a(4) =1011a(5) =4341a(6) =18567a(7) =79605a(8) =340803a(9) =1460349a(10) =6254199a(11) =26793693a(12) =114763635a(13) =491621157a(14) =2105830791a(15) =9020628261a(16) =38640044547a(17) =165518326125a(18) =709005955383
External references
- oeis: A183804