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Search: id:A102418
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| A102418 |
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Table of coefficients of Product{k=1..n, (1+x^A000120(k))}. |
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+0
1
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| 1, 1, 1, 1, 2, 1, 1, 2, 2, 2, 1, 1, 3, 4, 4, 3, 1, 1, 3, 5, 7, 7, 5, 3, 1, 1, 3, 6, 10, 12, 12, 10, 6, 3, 1, 1, 3, 6, 11, 15, 18, 20, 18, 15, 11, 6, 3, 1, 1, 4, 9, 17, 26, 33, 38, 38, 33, 26, 17, 9, 4, 1, 1, 4, 10, 21, 35, 50, 64, 71, 71, 64, 50, 35, 21, 10, 4, 1, 1, 4, 11, 25, 45, 71, 99, 121, 135, 135, 121, 99, 71, 45, 25, 11, 4, 1
(list; graph; listen)
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OFFSET
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0,5
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COMMENT
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Also table of coefficients of Product{k=0..n, (1+x^A000120(k))}/2. Row sums are 2^n. Row n has 1+A000788(n) elements.
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EXAMPLE
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Rows begin
{1},{1,1},{1,2,1},{1,2,2,2,1},{1,3,4,4,3,1}, {1,3,5,7,7,5,3,1}...
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CROSSREFS
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Sequence in context: A110535 A033941 A053256 this_sequence A106032 A003646 A112758
Adjacent sequences: A102415 A102416 A102417 this_sequence A102419 A102420 A102421
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KEYWORD
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nonn
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), Jan 08 2005
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