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A147001 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 00100-00100-11111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 4, 5, 13, 19, 43, 57, 239, 521, 2347, 5442, 24758, 63173, 355006, 1139569, 7776109, 29105899, 223723640, 955226817, 8533424348 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

LINKS

Table of n, a(n) for n=1..25.

EXAMPLE

Maximal 8 X 8 example

.0.0.1.1.1.1.1.0

.1.0.0.0.1.0.0.0

.1.0.0.0.1.0.0.1

.1.1.1.0.0.0.0.1

.1.0.0.0.0.1.1.1

.1.0.0.1.0.0.0.1

.0.0.0.1.0.0.0.1

.0.1.1.1.1.1.0.0

CROSSREFS

Sequence in context: A258281 A094029 A005672 * A247325 A140683 A304599

Adjacent sequences:  A146998 A146999 A147000 * A147002 A147003 A147004

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified January 24 22:45 EST 2022. Contains 350565 sequences. (Running on oeis4.)