Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 01010-11111 pattern in any orientation.
A147061
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 01010-11111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =1a(6) =10a(7) =1a(8) =26a(9) =1a(10) =220a(11) =25a(12) =1716a(13) =153a(14) =23943a(15) =1076a(16) =485243a(17) =13889a(18) =10665112a(19) =185108a(20) =364094762a(21) =4253039a(22) =18497655767a(23) =156271576a(25) =7383352471
External references
- oeis: A147061