A147102 - OEIS

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A147102

Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1000-1100-0111 pattern in any orientation.

1, 1, 1, 3, 7, 15, 33, 93, 429, 2069, 10289, 55429, 387995, 3482253, 35863559, 411870399, 5523860439, 89237334993, 1723598801687, 38814880673445, 1022726070574065

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,4

LINKS

Table of n, a(n) for n=1..21.

EXAMPLE

Maximal 8 X 8 example

.0.1.1.1.0.0.0.1

.1.1.0.0.0.0.0.1

.1.0.0.0.0.0.1.1

.1.0.0.0.1.1.1.0

.0.0.0.1.0.0.0.1

.0.0.1.1.0.0.1.1

.1.1.1.0.1.1.1.0

CROSSREFS

Sequence in context: A211279 A351660 A199882 * A147379 A213722 A325924

Adjacent sequences: A147099 A147100 A147101 * A147103 A147104 A147105

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved