Half the number of n X n symmetric binary matrices with no element unequal to a strict majority of its diagonal, vertical and horizontal neighbors.
A190657
Half the number of n X n symmetric binary matrices with no element unequal to a strict majority of its diagonal, vertical and horizontal neighbors.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =42a(5) =244a(6) =2031a(7) =22714a(8) =342292a(9) =6943430a(10) =188479666a(11) =6843502049a(12) =331910774405
External references
- oeis: A190657