Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 11011-01110 pattern in any orientation.
A147228
Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 11011-01110 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =2a(7) =1a(8) =4a(9) =1a(10) =6a(11) =1a(12) =14a(13) =3a(14) =43a(15) =10a(16) =138a(17) =29a(18) =612a(19) =94a(20) =3177a(21) =321a(22) =17102a(23) =1262a(24) =109974a(25) =7231a(26) =884546a(27) =51504
External references
- oeis: A147228