Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 00100-00100-11111-00100 pattern in any orientation.
A147328
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 00100-00100-11111-00100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =9a(8) =20a(9) =47a(10) =148a(11) =487a(12) =2258a(13) =13693a(14) =84456
External references
- oeis: A147328