Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-1100-0111 pattern in any orientation.
A146697
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-1100-0111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =17a(6) =57a(7) =245a(8) =1399a(9) =8039a(10) =58749a(11) =512869a(12) =6687103a(13) =97819251a(14) =1920614851a(15) =41357859019
External references
- oeis: A146697