Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1000-1111-0100 pattern in any orientation.
A146410
Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1000-1111-0100 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) =1a(11) =1a(12) =7a(13) =7a(14) =21a(15) =21a(16) =53a(17) =53a(18) =267a(19) =267a(20) =1477a(21) =1477a(22) =11799a(23) =11799
External references
- oeis: A146410