Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 110-111-100 pattern in any orientation.
A146185
Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 110-111-100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =1a(10) =5a(11) =5a(12) =17a(13) =17a(14) =43a(15) =43a(16) =197a(17) =197a(18) =1293a(19) =1293a(20) =11263a(21) =11263a(22) =110807a(23) =110807a(24) =1310257
External references
- oeis: A146185