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Search: id:A132921
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| 1, 2, 2, 3, 3, 4, 4, 4, 5, 6, 5, 5, 6, 7, 9, 6, 6, 7, 8, 10, 13, 7, 7, 8, 9, 11, 14, 19, 8, 8, 9, 10, 12, 15, 20, 28, 9, 9, 10, 11, 13, 16, 21, 29, 42, 10, 10, 11, 12, 14, 17, 22, 30, 43, 64
(list; table; graph; listen)
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OFFSET
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1,2
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COMMENT
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Right border = A081659, row sums = A132922: (1, 4, 10, 19, 32,...).
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FORMULA
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(A127648 * A000012 + A000012 * A127647) - A000012 as infinite lower triangular matrices. Triangle by columns: A081659(n-1) followed by (A081659(n-1) + 1), (A081659(n-1) + 2), (A081659(n-1) + 3),...
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EXAMPLE
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First few rows of the triangle are:
1;
2, 2;
3, 3, 4;
4, 4, 5, 6;
5, 5, 6, 7, 9;
...
Column 3 = 4, 5, 6, 7,...; since A081659(2) = 4.
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CROSSREFS
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Cf. A127648, A127647, A081659, A132922.
Sequence in context: A050506 A029122 A134482 this_sequence A028825 A132924 A076890
Adjacent sequences: A132918 A132919 A132920 this_sequence A132922 A132923 A132924
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KEYWORD
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nonn,tabl
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Sep 05 2007
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