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

1,4

Comments

A075462 is a(n) without the symmetry restriction.

Links

Table of n, a(n) for n=1..28.

Crossrefs

Sequence in context: A068930 A204815 A247642 * A097526 A051149 A293424

Adjacent sequences: A144257 A144258 A144259 * A144261 A144262 A144263

Keyword

nonn

Author

R. H. Hardin, Sep 16 2008

Status

approved