A146256 Number of n X n binary arrays with all ones connected only in a 110-111-101 pattern in any orientation.

1, 1, 9, 33, 81, 609, 23953, 643873, 12050113, 545308145, 74642042017, 10960166126121, 1660619212003185, 467825703162664825

Offset

1,3

Links

Table of n, a(n) for n=1..14.

Example

Maximal 8 X 8 example
.1.0.1.0.0.1.0.1
.1.1.1.0.0.1.1.1
.1.1.0.0.0.0.1.1
.0.0.1.0.1.0.0.0
.0.0.1.1.1.0.0.0
.1.1.0.1.1.0.1.1
.1.1.1.0.0.1.1.0
.1.0.1.0.0.1.1.1

Crossrefs

Sequence in context: A147170 A146823 A147027 * A394644 A005920 A020324

Adjacent sequences: A146253 A146254 A146255 * A146257 A146258 A146259

Keyword

nonn

Author

R. H. Hardin

Status

approved