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A139801
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A139687(n) (1, 1, 1, 2, 2, 1) differences by rows, 0's deleted (*).Triangle on line.
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1
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1, 2, 2, 2, 3, 3, 3, 6, 9, 9, 3, 6, 10, 14, 14, 4, 10, 20, 34, 48, 48, 4, 10, 20, 35, 55, 75, 75, 5, 15, 35, 70, 125, 200, 275, 275, 5, 15, 35, 70, 126, 209, 319, 429, 429, 6, 21, 56, 126, 252, 461, 780, 1209, 1638, 1638
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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COMMENTS
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(*) Full Triangle:
0;
1, 0;
2, 2, 0;
2, 3, 3, 0;
3, 6, 9, 9, 0;
3, 6, 10, 14, 14, 0;
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LINKS
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Table of n, a(n) for n=0..54.
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FORMULA
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Even rows (with a leading 1) are in A139687.Must be separated from odd rows.
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CROSSREFS
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Sequence in context: A161555 A029058 A046026 * A132328 A064822 A104484
Adjacent sequences: A139798 A139799 A139800 * A139802 A139803 A139804
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KEYWORD
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nonn,tabl,uned
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AUTHOR
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Paul Curtz, Jun 14 2008
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STATUS
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approved
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