Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0100-1100-1111 pattern in any orientation.
A146789
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0100-1100-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =9a(7) =15a(8) =43a(9) =69a(10) =163a(11) =581a(12) =2209a(13) =8241a(14) =41447a(15) =165505a(16) =1023967a(17) =5358635a(18) =39185391a(19) =257135019a(20) =2265291735
External references
- oeis: A146789