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Search: id:A151683
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| A151683 |
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Irregular triangle read by rows: row n (n>=0) gives binomial(wt(n+k),k), k >= 0, upto the the point where the terms are all zeros (wt() = A000120()). |
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+0
2
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| 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 2, 3, 1, 3, 1, 1, 1, 1, 2, 1, 1, 1, 2, 3, 1, 3, 1, 1, 1, 2, 3, 1, 1, 1, 3, 3, 4, 1, 3, 6, 1, 4, 1, 1, 1, 1, 2, 1, 1, 1, 2, 3, 1, 3, 1, 1, 1, 2, 3, 1, 1, 1, 3, 3, 4, 1, 3, 6, 1, 4, 1, 1, 1, 2, 3, 1, 1, 1, 3, 3, 4, 1, 3, 6, 1, 1, 1, 4, 3, 4, 1, 1, 1, 3
(list; graph; listen)
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OFFSET
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0,7
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COMMENT
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Suggested by Hagen von Eitzen's formula for A160573.
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EXAMPLE
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The rows for n = 0 .. 36 are:
. 1, 1,
. 1, 1, 1,
. 1, 2,
. 1, 1, 1,
. 1, 2, 1, 1,
. 1, 2, 3,
. 1, 3,
. 1, 1, 1,
. 1, 2, 1, 1,
. 1, 2, 3,
. 1, 3, 1, 1,
. 1, 2, 3, 1, 1,
. 1, 3, 3, 4,
. 1, 3, 6,
. 1, 4,
. 1, 1, 1,
. 1, 2, 1, 1,
. 1, 2, 3,
. 1, 3, 1, 1,
. 1, 2, 3, 1, 1,
. 1, 3, 3, 4,
. 1, 3, 6,
. 1, 4, 1, 1,
. 1, 2, 3, 1, 1,
. 1, 3, 3, 4,
. 1, 3, 6, 1, 1,
. 1, 4, 3, 4, 1, 1,
. 1, 3, 6, 4, 5,
. 1, 4, 6, 10,
. 1, 4, 10,
. 1, 5,
. 1, 1, 1,
. 1, 2, 1, 1,
. 1, 2, 3,
. 1, 3, 1, 1,
. 1, 2, 3, 1, 1,
. 1, 3, 3, 4,
...
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CROSSREFS
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Row sums are A160573.
Sequence in context: A030346 A030336 A078470 this_sequence A133912 A122934 A072170
Adjacent sequences: A151680 A151681 A151682 this_sequence A151684 A151685 A151686
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KEYWORD
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nonn,tabf
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Jun 01 2009
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