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

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