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A146172 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 110-100-111 pattern in any orientation. +0
1
1, 1, 1, 1, 1, 1, 117, 259, 1991, 4759, 52453, 136907, 6546215, 22604681, 6955049615, 33225401665, 5312086374693, 30690294218759, 6137053540967147, 42562920511505493, 35203573251917171119, 310505729227048458909 (list; graph; listen)
OFFSET

1,7

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.0.0.0.0

.1.1.0.0.0.0.1.1

.1.0.0.0.0.0.0.1

.1.1.1.0.0.1.1.1

.0.0.0.0.0.0.0.0

.0.0.1.0.0.1.0.0

.1.0.1.0.0.1.0.1

.1.1.1.0.0.1.1.1

CROSSREFS

Sequence in context: A064180 A050245 A031174 this_sequence A146189 A063332 A063338

Adjacent sequences: A146169 A146170 A146171 this_sequence A146173 A146174 A146175

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net), Oct 27 2008

page 1

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.


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