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A161138
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Main diagonal of the triangular array A161136.
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1
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1, 3, 9, 18, 80, 196, 554, 1824, 2292, 7218, 45522, 288135, 660113, 3201130, 10512530, 17675063, 191230544, 207521990
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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FORMULA
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CROSSREFS
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KEYWORD
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more,nonn
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AUTHOR
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STATUS
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approved
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