Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1000-1111 pattern in any orientation.
A146600
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1000-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =5a(7) =19a(8) =39a(9) =83a(10) =233a(11) =711a(12) =2313a(13) =8511a(14) =40097a(15) =191977a(16) =1081845a(17) =6288993a(18) =41547129a(19) =292524045a(20) =2387601825a(21) =20697818111
External references
- oeis: A146600