Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 01110-11111 pattern in any orientation.
A147365
Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 01110-11111 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) =133a(17) =29a(18) =589a(19) =94a(20) =2990a(21) =317a(22) =15789a(23) =1198a(24) =99524a(25) =6765a(26) =770619
External references
- oeis: A147365