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A204387
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Triangle read by rows: T(n,k) (n >= 1, 2 <= k <= n-1) is number of non-crossing trees with k nodes and path-length n.
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0
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1, 0, 1, 0, 2, 1, 0, 0, 4, 1, 0, 0, 3, 6, 1, 0, 0, 4, 10, 8, 1, 0, 0, 0, 12, 21, 10, 1, 0, 0, 0, 12, 32, 28, 12, 1, 0, 0, 0, 6, 45
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,5
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LINKS
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EXAMPLE
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Triangle begins:
1
0 1
0 2 1
0 0 4 1
0 0 3 6 1
0 0 4 10 8 1
0 0 0 12 21 10 1
0 0 0 12 32 28 12 1
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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