Half the number of n X n symmetric binary matrices with no element unequal to a strict majority of its vertical, antidiagonal and horizontal neighbors.
A190658
Half the number of n X n symmetric binary matrices with no element unequal to a strict majority of its vertical, antidiagonal and horizontal neighbors.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =38a(5) =252a(6) =2107a(7) =22478a(8) =331824a(9) =6625044a(10) =173531500a(11) =6026107049a(12) =280634679581
External references
- oeis: A190658