Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 00100-00100-11111 pattern in any orientation.
A146996
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 00100-00100-11111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =7a(5) =1a(6) =28a(7) =9a(8) =229a(9) =55a(10) =5513a(11) =1233a(12) =246733a(13) =35489a(14) =18835539a(15) =2205048a(16) =2577591714a(17) =236261747a(18) =672360073942a(19) =49798609885
External references
- oeis: A146996