Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1000-1111-0010 pattern in any orientation.
A147110
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1000-1111-0010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =11a(7) =27a(8) =61a(9) =281a(10) =1727a(11) =11625a(12) =76357a(13) =665913a(14) =7707541a(15) =106860049a(16) =1716071101a(17) =33302211687a(18) =805167504153
External references
- oeis: A147110