Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 00100-11111-00100 pattern in any orientation.
A147010
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 00100-11111-00100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =5a(6) =9a(7) =19a(8) =56a(9) =167a(10) =758a(11) =2457a(12) =14728a(13) =66625a(14) =526225a(15) =3298653a(16) =34425031a(17) =276512141a(18) =3848586911a(19) =41626261490
External references
- oeis: A147010