A147134 - OEIS

A147134

Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1001-1111 pattern in any orientation.

1, 1, 1, 1, 1, 3, 13, 31, 81, 343, 1923, 13549, 94903, 802247, 8564607, 113354205, 1800337015, 33663851515, 758043047263, 20744856409045

OFFSET

1,6

LINKS

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.0.0.0.0

.0.0.0.0.0.1.1.1

.0.0.0.0.0.0.0.1

.0.0.1.0.0.0.1.1

.0.0.1.0.0.1.0.0

.0.0.1.1.1.1.0.0

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved