Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-0111-0100 pattern in any orientation.
A146463
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-0111-0100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =17a(9) =17a(10) =49a(11) =49a(12) =361a(13) =361a(14) =6061a(15) =6061a(16) =172273a(17) =172273a(18) =5274005a(19) =5274005a(20) =274545571a(21) =274545571a(22) =26127520797a(23) =26127520797
External references
- oeis: A146463