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A147158 Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1000-1100-0111-0100 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 3, 9, 19, 35, 85 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,9

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Maximal 9 X 9 example

.0.0.0.0.0.1.1.0.0

.0.0.0.1.1.1.0.0.0

.0.0.0.0.1.0.0.0.1

.0.1.0.0.1.0.0.1.1

.0.1.1.1.0.1.1.1.0

.1.1.0.0.1.0.0.1.0

.1.0.0.0.1.0.0.0.0

.0.0.0.1.1.1.0.0.0

.0.0.1.1.0.0.0.0.0

CROSSREFS

Sequence in context: A062748 A325666 A147174 * A014540 A293058 A294367

Adjacent sequences:  A147155 A147156 A147157 * A147159 A147160 A147161

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified October 16 03:15 EDT 2019. Contains 328038 sequences. (Running on oeis4.)