A147086 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 10001-11111 pattern in any orientation.

1, 1, 1, 1, 1, 1, 5, 13, 33, 133, 443, 1649, 9331, 62887, 470664, 4206245, 41999179, 473581733, 6364226039, 101605745953, 1937023317718, 43487285044885, 1131769983108977

Offset

1,7

Links

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

Example

Maximal 8 X 8 example
.0.0.0.0.0.0.0.0
.0.0.0.1.0.0.0.1
.0.0.0.1.1.1.1.1
.0.1.1.0.0.0.0.0
.0.0.1.0.0.0.0.0
.0.0.1.0.0.0.0.0
.0.0.1.0.0.0.0.0
.0.1.1.0.0.0.0.0

Crossrefs

Sequence in context: A283959 A055426 A146621 * A032406 A146917 A283329

Adjacent sequences: A147083 A147084 A147085 * A147087 A147088 A147089

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved