Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0001-1101-0111 pattern in any orientation.
A147257
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0001-1101-0111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =5a(6) =17a(7) =39a(8) =137a(9) =661a(10) =3965a(11) =30475a(12) =261877a(13) =2593597a(14) =32463645a(15) =507974205a(16) =9631596681a(17) =224195557727
External references
- oeis: A147257