A147353 - OEIS

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A147353

Number of n X n binary arrays with all ones connected only in a 0110-0110-1111 pattern in any orientation.

1, 1, 1, 9, 25, 57, 551, 8604, 122881, 1647352, 42868635, 1998622860, 114645170079, 7404803994915

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

OFFSET

1,4

LINKS

Table of n, a(n) for n=1..14.

EXAMPLE

Maximal 8 X 8 example

.1.1.1.1.0.0.0.0

.0.1.1.0.0.0.0.1

.0.1.1.0.0.1.1.1

.0.0.0.0.0.1.1.1

.0.0.0.0.0.0.0.1

.1.1.1.1.0.1.1.0

.0.1.1.0.0.1.1.0

.0.1.1.0.1.1.1.1

CROSSREFS

Sequence in context: A147325 A147368 A147497 * A049740 A147405 A111440

Adjacent sequences: A147350 A147351 A147352 * A147354 A147355 A147356

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved