A147363 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 01110-11111 pattern in any orientation.

1, 1, 1, 1, 1, 3, 10, 29, 94, 317, 1198, 6765, 47364, 374535, 3411133, 34790832, 407506091, 5940149025, 105319233307, 2203658353952, 54294696366064, 1560466368060039, 52336543507272089

Offset

1,6

Links

Table of n, a(n) for n=1..23.

Example

Maximal 8 X 8 example
.0.1.1.1.1.1.0.0
.1.0.1.1.1.0.0.0
.1.1.0.0.0.0.0.1
.1.1.0.0.0.0.1.1
.1.1.0.0.0.0.1.1
.1.0.0.0.0.0.1.1
.0.0.0.1.1.1.0.1
.0.0.1.1.1.1.1.0

Crossrefs

Sequence in context: A307062 A052976 A361365 * A147226 A301879 A147062

Adjacent sequences: A147360 A147361 A147362 * A147364 A147365 A147366

Keyword

nonn

Author

R. H. Hardin

Status

approved