Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 01000-11111-01000 pattern in any orientation.
A147023
Number of n X n binary arrays symmetric about both diagonal and antidiagonal 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) =3a(9) =5a(10) =11a(11) =17a(12) =29a(13) =49a(14) =194a(15) =513a(16) =1943a(17) =5111a(18) =18756a(19) =56573a(20) =304185a(21) =1238797a(22) =7708601a(23) =34648607a(24) =235404133a(25) =1230092163a(26) =10469480011a(27) =68020491883
External references
- oeis: A147023