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A146241 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 110-111-010 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 37, 73, 549, 1155, 18213, 46753, 1912543, 6241489, 625732277, 2571374751, 388840217669, 1994859107661, 608353553481999, 3912610945442677, 2428168209787780883, 19568752353921733413, 24097482751802550964553 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,7
LINKS
EXAMPLE
Maximal 8 X 8 example
.0.1.0.0.0.0.1.0
.1.1.1.0.0.1.1.1
.1.1.0.0.0.0.1.1
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.1.0.0.0.0.1.0
.1.1.1.0.0.1.1.1
.0.1.1.0.0.1.1.0
CROSSREFS
Sequence in context: A137833 A083748 A146273 * A217386 A083990 A123815
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified March 28 16:34 EDT 2024. Contains 371254 sequences. (Running on oeis4.)