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Search: id:A129240
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| 1, 2, 2, 4, 0, 3, 6, 5, 0, 4, 9, 0, 3, 0, 5, 12, 9, 4, 4, 0, 6, 16, 0, 3, 0, 5, 0, 7, 20, 14, 4, 9, 0, 6, 0, 8, 25, 0, 8, 0, 5, 0, 7, 0, 9, 30, 20, 4, 9, 6, 6, 0, 8, 0, 10
(list; table; graph; listen)
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OFFSET
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1,2
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COMMENT
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Left border = A002620 starting (1, 2, 4, 6, 9, 12, 16,...).
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FORMULA
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A128174 * A129234 as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
2, 2;
4, 0, 3;
6, 5, 0, 4;
9, 0, 3, 0, 5;
12, 9, 4, 4, 0, 6;
16, 0, 3, 0, 5, 0, 7;
...
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CROSSREFS
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Cf. A128174, A129234, A002620.
Sequence in context: A127528 A063070 A049802 this_sequence A127786 A030207 A061006
Adjacent sequences: A129237 A129238 A129239 this_sequence A129241 A129242 A129243
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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), Apr 05 2007
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