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1, 1, 3, 1, 6, 4, 1, 9, 12, 5, 1, 12, 24, 20, 7, 1, 15, 40, 50, 35, 8, 1, 18, 60, 100, 105, 48, 9, 1, 21, 84, 175, 245, 168, 63, 11, 1, 24, 112, 280, 490, 448, 252, 88, 12, 1, 27, 144, 420, 882, 1008, 756, 396, 108, 13, 1, 30, 180, 600, 1470, 2016, 1890, 1320, 540, 130, 15, 1, 33, 220, 825, 2310, 3696, 4158, 3630, 1980, 715, 165, 16
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,3
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COMMENTS
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Row sums = A100335: (1, 4, 11, 27, 64, 149, ...).
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LINKS
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FORMULA
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Binomial transform of A133109, as an infinite lower triangular matrix.
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EXAMPLE
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First few rows of the triangle:
1;
1, 3;
1, 6, 4;
1, 9, 12, 5;
1, 12, 24, 20, 7;
1, 15, 40, 50, 35, 8;
1, 18, 60, 100, 105, 48, 9;
...
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CROSSREFS
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KEYWORD
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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