Number of n X n symmetric binary matrices with each element either the sum mod 2 of its horizontal neighbors or the sum mod 2 of its vertical neighbors.
A192258
Number of n X n symmetric binary matrices with each element either the sum mod 2 of its horizontal neighbors or the sum mod 2 of its vertical neighbors.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =10a(4) =52a(5) =305a(6) =3336a(7) =53160a(8) =1210187a(9) =43234473a(10) =2296063392a(11) =180971357507
External references
- oeis: A192258