A147500 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A147500

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

0

1, 1, 1, 1, 1, 3, 9, 19, 37, 159, 849, 4243, 19707, 136969, 1272775, 12839957

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

OFFSET

1,6

LINKS

Table of n, a(n) for n=1..16.

EXAMPLE

Maximal 8 X 8 example

.0.0.1.1.1.0.0.0

.0.0.0.1.1.0.0.0

.1.0.0.1.1.1.0.0

.1.1.1.0.0.0.0.0

.1.1.1.0.0.0.0.0

.0.0.1.0.0.0.0.0

.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.0

CROSSREFS

Sequence in context: A339495 A146694 A146050 * A300445 A115238 A005994

Adjacent sequences: A147497 A147498 A147499 * A147501 A147502 A147503

KEYWORD

nonn

AUTHOR

STATUS

approved