Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 01000-11111-00010 pattern in any orientation.

A147015

Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 01000-11111-00010 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) =193a(15) =509a(16) =1945a(17) =5173a(18) =19089a(19) =57135a(20) =304805a(21) =1236463a(22) =7710953a(23) =34938029a(24) =239632727a(25) =1249524805a(26) =10579289505a(27) =68493745825

External references