Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 11000-01100-00110-00011 pattern in any orientation.
A147445
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 11000-01100-00110-00011 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =17a(9) =25a(10) =429a(11) =829a(12) =9009a(13) =20193a(14) =266141a(15) =668397a(16) =14825377a(17) =42405573a(18) =3005094483a(19) =10429358879
External references
- oeis: A147445