Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 2X3 U in any orientation.
A146055
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 2X3 U in any orientation.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =1a(4) =19a(5) =9a(6) =285a(7) =231a(8) =16083a(9) =5087a(10) =1835713a(11) =304405a(12) =353122721a(13) =80250539a(14) =202921921043a(15) =41930288075
External references
- oeis: A146055