Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1100-0110-0011 pattern in any orientation.
A147145
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1100-0110-0011 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =13a(9) =25a(10) =51a(11) =161a(12) =489a(13) =1381a(14) =4593a(15) =16307a(16) =70385
External references
- oeis: A147145