Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1001-1111 pattern in any orientation.
A146621
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1001-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =5a(6) =13a(7) =33a(8) =131a(9) =465a(10) =2505a(11) =18109a(12) =137539a(13) =1253575a(14) =13645721a(15) =177302103a(16) =2859333451a(17) =55979477433
External references
- oeis: A146621