Number of n X n binary matrices, symmetric under horizontal reflection, with no more than 2 ones in any 2 X 2 subblock.
A141503
Number of n X n binary matrices, symmetric under horizontal reflection, with no more than 2 ones in any 2 X 2 subblock.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =35a(4) =85a(5) =5529a(6) =17421a(7) =6468501a(8) =30238457a(9) =64377477751a(10) =410142991045
External references
- oeis: A141503