Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 01010-11111-00100 pattern in any orientation.
A147350
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 01010-11111-00100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =3a(9) =5a(10) =11a(11) =17a(12) =27a(13) =45a(14) =160a(15) =433a(16) =1641a(17) =4369a(18) =14054a(19) =40457a(20) =191997a(21) =778779a(22) =4556420a(23) =20430987a(24) =121470430a(25) =600262553
External references
- oeis: A147350