Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0100-0100-1111 pattern in any orientation.
A146577
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0100-0100-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =17a(6) =71a(7) =385a(8) =1763a(9) =10689a(10) =97117a(11) =1072429a(12) =14923393a(13) =247249411a(14) =5297126647a(15) =138340878961
External references
- oeis: A146577