Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1111 pattern in any orientation.
A146226
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =29a(9) =29a(10) =221a(11) =221a(12) =2091a(13) =2091a(14) =47147a(15) =47147a(16) =1321607a(17) =1321607a(18) =74618535a(19) =74618535a(20) =6202582309a(21) =6202582309
External references
- oeis: A146226