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Search: id:A130269
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| 1, 3, 4, 6, 7, 9, 10, 11, 13, 16, 15, 16, 18, 21, 25, 21, 22, 24, 27, 31, 36, 28, 29, 31, 34, 38, 43, 49, 36, 37, 39, 42, 46, 51, 57, 64, 45, 46, 48, 51, 55, 60, 66, 73, 81, 55, 56, 58, 61, 65, 70, 76, 83, 91, 100
(list; table; graph; listen)
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OFFSET
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1,2
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COMMENT
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Row sums = A002412: (1, 7, 22, 50, 95,...)
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FORMULA
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A002260 * A051340 as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
3, 4;
6, 7, 9;
10, 11, 13, 16;
15, 16, 18, 21, 25,
21, 22, 24, 27, 31, 36;
28, 29, 31, 34, 38, 43, 49;
...
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CROSSREFS
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Cf. A002260, A051340, A002412.
Sequence in context: A087753 A070762 A061208 this_sequence A078607 A026322 A049624
Adjacent sequences: A130266 A130267 A130268 this_sequence A130270 A130271 A130272
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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), May 18 2007
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