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Search: id:A137587
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| 1, 2, 1, 3, 0, 1, 5, 2, 0, 1, 6, 1, 0, 0, 1, 11, 3, 2, 0, 0, 1, 12, 2, 1, 0, 0, 0, 1, 20, 6, 1, 2, 0, 0, 0, 1, 25, 4, 3, 1, 0, 0, 0, 0, 1, 37, 9, 2, 1, 2, 0, 0, 0, 0, 1, 43, 8, 3, 1, 1, 0, 0, 0, 0, 0, 1, 70, 16, 6, 3, 1, 2, 0, 0, 0, 0, 0, 1
(list; table; graph; listen)
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OFFSET
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1,2
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COMMENT
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That is, regard A051731 and A026794 as lower triangular square matrices and multiply them, then take the lower triangle of the product,
Left column = A083710 starting (1, 2, 3, 5, 6, 11, 12,...). Row sums = A047968.
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FORMULA
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Inverse mobius transform of the partition triangle, A026794
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EXAMPLE
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First few rows of the triangle are:
.1;
.2, 1;
.3, 0, 1;
.5, 2, 0, 1;
.6, 1, 0, 0, 1;
.11, 3, 2, 0, 0, 1;
.12, 2, 1, 0, 0, 0, 1;
.20, 6, 1, 2, 0, 0, 0, 1;
.25, 4, 3, 1, 0, 0, 0, 0, 1;
....
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CROSSREFS
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Cf. A026794, A051731, A083710, A047968.
Sequence in context: A113287 A096798 A158902 this_sequence A168021 A137639 A113288
Adjacent sequences: A137584 A137585 A137586 this_sequence A137588 A137589 A137590
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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), Jan 27 2008
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EXTENSIONS
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Typo in 9th row corrected by M. F. Hasler, Jun 08 2009
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