A144260 Number of symmetric n X n binary matrices with each element equal to one minus the sum of its horizontal and vertical neighbors, modulo two.

1, 1, 1, 4, 2, 1, 1, 1, 16, 1, 8, 1, 1, 4, 1, 16, 2, 1, 256, 1, 1, 1, 128, 4, 1, 1, 1, 1

Offset: 1

Author

R. H. Hardin, Sep 16 2008

Keywords

• nonn

Comments

A075462 is a(n) without the symmetry restriction.