Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1000-1111-0001 pattern in any orientation.
A146607
Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1000-1111-0001 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) =3a(13) =3a(14) =9a(15) =9a(16) =19a(17) =19a(18) =59a(19) =59a(20) =237a(21) =237a(22) =1193a(23) =1193a(24) =6925a(25) =6925a(26) =46535a(27) =46535a(28) =385115a(29) =385115
External references
- oeis: A146607