Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1110-0111-0001 pattern in any orientation.
A147404
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1110-0111-0001 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =5a(4) =1a(5) =9a(6) =13a(7) =53a(8) =137a(9) =741a(10) =2493a(11) =19441a(12) =73321a(13) =1016967a(14) =4911015a(15) =87040405a(16) =643897713
External references
- oeis: A147404