A146405 - OEIS

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A146405

Number of n X n binary arrays with all ones connected only in a 1000-1111-0100 pattern in any orientation.

1, 1, 1, 17, 53, 413, 6475, 139711, 4765521, 251545591, 21612521501, 2948268913163

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

OFFSET

1,4

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Maximal 8 X 8 example

.0.1.1.0.1.1.0.0

.1.1.0.1.1.0.1.0

.0.1.0.0.1.0.1.0

.0.1.0.0.1.0.1.1

.1.0.0.0.0.1.1.0

.1.1.1.1.0.0.0.1

.0.1.0.0.1.1.1.1

.0.0.0.0.0.0.1.0

CROSSREFS

Sequence in context: A146847 A146714 A146397 * A228244 A158968 A072895

Adjacent sequences: A146402 A146403 A146404 * A146406 A146407 A146408

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved