Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1010-1111-0100 pattern in any orientation.
A146637
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1010-1111-0100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =7a(6) =21a(7) =49a(8) =223a(9) =1043a(10) =7899a(11) =74561a(12) =730567a(13) =8688119a(14) =134449641a(15) =2597702163a(16) =64827359403
External references
- oeis: A146637