A147061 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 01010-11111 pattern in any orientation.

1, 1, 1, 1, 5, 1, 10, 1, 26, 1, 220, 25, 1716, 153, 23943, 1076, 485243, 13889, 10665112, 185108, 364094762, 4253039, 18497655767, 156271576, 1302420306077, 7383352471

Offset

1,5

Links

Table of n, a(n) for n=1..26.

Example

Maximal 9 X 9 example
.0.0.1.1.1.1.1.0.0
.0.0.0.1.0.1.0.0.0
.0.0.1.0.0.0.1.0.0
.0.0.1.1.0.1.1.0.0
.0.0.1.0.0.0.1.0.0
.0.0.1.1.0.1.1.0.0
.0.0.1.0.0.0.1.0.0
.0.0.0.1.0.1.0.0.0
.0.0.1.1.1.1.1.0.0

Crossrefs

Sequence in context: A329373 A147362 A147225 * A147386 A145759 A131414

Adjacent sequences: A147058 A147059 A147060 * A147062 A147063 A147064

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved