Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11000-01111-11000 pattern in any orientation.
A147454
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11000-01111-11000 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =1a(10) =30a(11) =13a(12) =224a(13) =49a(14) =2000a(15) =233a(16) =18098a(17) =1439a(18) =209069a(19) =14021a(20) =3920160a(21) =187331a(22) =110361488a(23) =3462054
External references
- oeis: A147454