Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1100-0110-0011 pattern in any orientation.
A146450
Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1100-0110-0011 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) =3a(11) =3a(12) =7a(13) =7a(14) =15a(15) =15a(16) =49a(17) =49a(18) =233a(19) =233a(20) =1205a(21) =1205a(22) =7091a(23) =7091a(24) =56369a(25) =56369a(26) =554977a(27) =554977a(28) =6653663a(29) =6653663
External references
- oeis: A146450