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1, 3, 1, 5, 2, 1, 7, 2, 2, 1, 9, 2, 2, 2, 1, 11, 2, 2, 2, 2, 1, 13, 2, 2, 2, 2, 2, 1, 15, 2, 2, 2, 2, 2, 2, 1, 17, 2, 2, 2, 2, 2, 2, 2, 1, 19, 2, 2, 2, 2, 2, 2, 2, 2, 1, 21, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 23, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1
(list;
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OFFSET
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1,2
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COMMENTS
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Row sums give A008574.
A131033 = A130296 * A097806.
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LINKS
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Table of n, a(n) for n=1..78.
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FORMULA
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A097806 * A130296 as infinite lower triangular matrices. A097806 = the pairwise operator, A130296 = (1; 2,1; 3,1,1; ...).
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EXAMPLE
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First few rows of the triangle are:
1;
3, 1;
5, 2, 1;
7, 2, 2, 1;
9, 2, 2, 2, 1;
11, 2, 2, 2, 2, 1;
13, 2, 2, 2, 2, 2, 1;
...
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CROSSREFS
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Cf. A008574, A097806, A130296, A131033.
Sequence in context: A111426 A100576 A212332 * A130323 A130303 A100898
Adjacent sequences: A131029 A131030 A131031 * A131033 A131034 A131035
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KEYWORD
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nonn,tabl
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AUTHOR
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Gary W. Adamson, Jun 10 2007
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EXTENSIONS
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Definition corrected and more terms from Georg Fischer, Oct 10 2021
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STATUS
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approved
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