Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1000-1100-0111 pattern in any orientation.
A147101
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1000-1100-0111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =5a(9) =5a(10) =19a(11) =19a(12) =87a(13) =87a(14) =379a(15) =379a(16) =2665a(17) =2665a(18) =39873a(19) =39873a(20) =702997a(21) =702997a(22) =16924511a(23) =16924511a(24) =488669357a(25) =488669357
External references
- oeis: A147101