Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 01010-11111 pattern in any orientation.
A147063
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 01010-11111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =2a(7) =3a(8) =6a(9) =9a(10) =16a(11) =23a(12) =74a(13) =177a(14) =647a(15) =1682a(16) =5837a(17) =15849a(18) =74186a(19) =276554a(20) =1634940a(21) =7124985a(22) =45487535a(23) =222097984a(24) =1721224041a(25) =10469414217a(26) =99805923832
External references
- oeis: A147063