Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1101-1111 pattern in any orientation.
A146866
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1101-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =9a(6) =25a(7) =67a(8) =375a(9) =1415a(10) =11011a(11) =122823a(12) =1158135a(13) =14699219a(14) =232067021a(15) =4207284521a(16) =106772232239
External references
- oeis: A146866