A147422 - OEIS

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A147422

Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 10101-11111 pattern in any orientation.

0

1, 1, 1, 1, 15, 5, 49, 17, 271, 61, 18529, 4397, 509931, 142159, 26069792

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

OFFSET

1,5

LINKS

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

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.0

.0.1.1.0.0.1.1.0

.0.0.1.0.0.1.0.0

.0.1.1.0.0.1.1.0

.0.0.1.0.0.1.0.0

.0.1.1.0.0.1.1.0

CROSSREFS

Sequence in context: A166209 A040215 A335879 * A147084 A147361 A147224

Adjacent sequences: A147419 A147420 A147421 * A147423 A147424 A147425

KEYWORD

nonn

AUTHOR

STATUS

approved