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A259100
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Triangle read by rows, arising in the enumeration of corners.
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1
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1, 0, 1, 0, 2, 1, 0, 3, 2, 1, 0, 4, 5, 2, 1, 0, 5, 8, 5, 2, 1, 0, 6, 14, 10, 5, 2, 1, 0, 7, 20, 18, 10, 5, 2, 1, 0, 8, 30, 30, 20, 10, 5, 2, 1
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,5
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LINKS
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FORMULA
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Kreweras gives a recurrence on page 281.
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EXAMPLE
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Triangle begins:
1;
0, 1;
0, 2, 1;
0, 3, 2, 1;
0, 4, 5, 2, 1;
0, 5, 8, 5, 2, 1;
0, 6, 14, 10, 5, 2, 1;
0, 7, 20, 18, 10, 5, 2, 1;
0, 8, 30, 30, 20, 10, 5, 2, 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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