Number of n X n binary arrays with all ones connected only in two by two blocks.
A145857
Number of n X n binary arrays with all ones connected only in two by two blocks.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =12a(4) =72a(5) =513a(6) =4531a(7) =68662a(8) =1429824a(9) =40840428a(10) =1747979822a(11) =106711196102
External references
- oeis: A145857