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Search: id:A131919
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| 1, 3, 3, 5, 3, 5, 7, 4, 4, 7, 9, 5, 5, 5, 9, 11, 6, 6, 6, 6, 11, 13, 7, 7, 7, 7, 7, 13, 15, 8, 8, 8, 8, 8, 8, 15, 17, 9, 9, 9, 9, 9, 9, 9, 17, 19, 10, 10, 10, 10, 10, 10, 10, 10, 19
(list; table; graph; listen)
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OFFSET
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0,2
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COMMENT
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Row sums = A028872: (1, 6, 13, 22, 33, 46,...).
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FORMULA
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A002024 + A131821 - A000012 as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
3, 3;
5, 3, 5;
7, 4, 4, 7;
9, 5, 5, 5, 9;
11, 6, 6, 6, 6, 11;
13, 7, 7, 7, 7, 7, 13;
...
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CROSSREFS
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Cf. A002024, A131821, A000012, A028872.
Sequence in context: A065507 A101772 A158894 this_sequence A131832 A078587 A033558
Adjacent sequences: A131916 A131917 A131918 this_sequence A131920 A131921 A131922
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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), Jul 28 2007
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