Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 0100-1100-0111 pattern in any orientation.
A146583
Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 0100-1100-0111 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) =11a(13) =11a(14) =31a(15) =31a(16) =107a(17) =107a(18) =597a(19) =597a(20) =4235a(21) =4235a(22) =35993a(23) =35993
External references
- oeis: A146583