A147150 - 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

A147150

Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1100-0111-0010 pattern in any orientation.

1, 1, 1, 1, 1, 5, 15, 33, 101, 729, 5159, 33035, 302287, 3979621, 62594669, 1090041091, 25034274381, 742760513733, 26752494041629

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

OFFSET

1,6

LINKS

Table of n, a(n) for n=1..19.

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.1

.0.0.0.0.0.0.1.1

.0.0.0.0.1.1.1.0

.0.0.0.1.0.1.0.0

.0.0.0.1.1.0.0.0

.0.0.1.1.0.0.0.0

.0.1.1.0.0.0.0.0

CROSSREFS

Sequence in context: A055004 A332355 A147264 * A374716 A279231 A377054

Adjacent sequences: A147147 A147148 A147149 * A147151 A147152 A147153

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved