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A189508
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Column 2 of triangle in A189507.
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1
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1, 3, 21, 160, 1620, 19068, 264420, 4166880, 74011488, 1459381440, 31674232128
(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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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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