A147497 - OEIS

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A147497

Number of n X n binary arrays with all ones connected only in a 1110-0110-0111 pattern in any orientation.

1, 1, 1, 9, 25, 57, 501, 8327, 120657, 1392679, 36251459, 1768772831, 102759395829, 6127996773779, 561420488133019

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,4

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

Maximal 8 X 8 example

.0.0.1.0.0.0.0.0

.1.1.1.0.0.1.0.0

.1.1.1.0.0.1.1.1

.1.0.0.0.0.1.1.1

.0.0.0.0.0.0.0.1

.1.1.1.0.1.1.1.0

.0.1.1.0.0.1.1.0

.0.1.1.1.0.1.1.1

CROSSREFS

Sequence in context: A147338 A147325 A147368 * A147353 A049740 A147405

Adjacent sequences: A147494 A147495 A147496 * A147498 A147499 A147500

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved