Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 01010-11111-00100 pattern in any orientation.
A147348
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 01010-11111-00100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =5a(7) =1a(8) =13a(9) =1a(10) =69a(11) =13a(12) =485a(13) =49a(14) =4382a(15) =229a(16) =57887a(17) =1867a(18) =1002742a(19) =20463a(20) =24091943a(21) =291821a(22) =827339114a(23) =6315721a(24) =38784934830a(25) =181852653
External references
- oeis: A147348