A146446 - OEIS

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A146446

Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-0110-0011 pattern in any orientation.

0

1, 1, 1, 1, 1, 1, 11, 17, 249, 505, 5595, 13277, 255723, 714985, 48904687, 172919585, 23239333565, 103253283519, 18873899120725, 102743668838719, 32633484992496285, 217183989203759529, 151537474245121050379

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

OFFSET

1,7

LINKS

Table of n, a(n) for n=1..23.

EXAMPLE

Maximal 8 X 8 example

.1.0.0.0.0.0.0.1

.1.1.0.0.0.0.1.1

.0.1.1.0.0.1.1.0

.0.0.1.0.0.1.0.0

.1.0.0.0.0.0.0.1

.1.1.0.0.0.0.1.1

.0.1.1.0.0.1.1.0

.0.0.1.0.0.1.0.0

CROSSREFS

Sequence in context: A262552 A279332 A286959 * A228055 A132092 A226258

Adjacent sequences: A146443 A146444 A146445 * A146447 A146448 A146449

KEYWORD

nonn

AUTHOR

STATUS

approved