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A145965 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a one by five or five by one block. 0
1, 1, 1, 1, 17, 5, 96, 29, 1419, 169, 48156, 8811, 3676473, 492443, 567795363, 62520266, 184305203904, 12468804407, 98912284885392, 5057793701769 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..20.

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

.1.0.1.0.0.1.0.1

.1.0.1.0.0.1.0.1

.1.0.1.0.0.1.0.1

.1.0.1.0.0.1.0.1

.1.0.1.0.0.1.0.1

CROSSREFS

Sequence in context: A297982 A298631 A243933 * A040276 A166211 A086763

Adjacent sequences:  A145962 A145963 A145964 * A145966 A145967 A145968

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 25 2008

STATUS

approved

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Last modified October 18 05:07 EDT 2019. Contains 328145 sequences. (Running on oeis4.)