Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 10000-11111-10000 pattern in any orientation.
A147079
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 10000-11111-10000 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) =3a(10) =6a(11) =11a(12) =18a(13) =29a(14) =61a(15) =169a(16) =515a(17) =1567a(18) =4591a(19) =14997a(20) =48832a(21) =200369a(22) =837466a(23) =4124094a(24) =19846005a(25) =109320099a(26) =602369436
External references
- oeis: A147079