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A146614 Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1000-1111-0110 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 3, 9, 19, 33, 71, 211, 797, 3273, 14255, 57311, 279147, 1519281, 10176213, 72296847, 593664689 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,8

LINKS

Table of n, a(n) for n=1..22.

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.0.1.0.0

.0.0.1.1.1.1.0.0

.0.1.0.1.1.0.1.1

.0.1.1.0.0.1.1.0

.0.1.1.0.0.1.1.0

.1.1.0.1.1.0.1.0

.0.0.1.1.1.1.0.0

.0.0.1.0.0.0.0.0

CROSSREFS

Sequence in context: A146803 A146702 A146734 * A146670 A146409 A147111

Adjacent sequences:  A146611 A146612 A146613 * A146615 A146616 A146617

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified December 7 22:50 EST 2021. Contains 349590 sequences. (Running on oeis4.)