Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 01000-11111-01000 pattern in any orientation.
A147026
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 01000-11111-01000 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =9a(6) =17a(7) =35a(8) =145a(9) =589a(10) =2723a(11) =16121a(12) =110705a(13) =888953a(14) =8435682a(15) =98480917a(16) =1294018001a(17) =21003172843
External references
- oeis: A147026