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Search: id:A131818
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| 1, 2, 2, 3, 2, 3, 4, 2, 3, 4, 5, 2, 3, 4, 5, 6, 2, 3, 4, 5, 6, 7, 2, 3, 4, 5, 6, 7, 8, 2, 3, 4, 5, 6, 7, 8, 9, 2, 3, 4, 5, 6, 7, 8, 9, 10, 2, 3, 4, 5, 6, 7, 8, 9, 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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Row sums = A034856; (1, 4, 8, 13, 19, 26, 34,...).
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FORMULA
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A130296 + A002260 - A000012 as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
2, 2;
3, 2, 3;
4, 2, 3, 4;
5, 2, 3, 4, 5;
6, 2, 3, 4, 5, 6;
7, 2, 3, 4, 5, 6, 7;
...
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CROSSREFS
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Cf. A130296, A002260, A034856.
Sequence in context: A101037 A002199 A104324 this_sequence A070081 A034883 A071647
Adjacent sequences: A131815 A131816 A131817 this_sequence A131819 A131820 A131821
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KEYWORD
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nonn,tabl,more
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Jul 18 2007
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