Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 01000-11111-01000 pattern in any orientation.
A147024
Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 01000-11111-01000 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) =1a(12) =5a(13) =1a(14) =16a(15) =5a(16) =63a(17) =13a(18) =192a(19) =31a(20) =643a(21) =111a(22) =3455a(23) =377a(24) =19521a(25) =1541a(26) =150737a(27) =10233
External references
- oeis: A147024