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Search: id:A134399
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| A134399 |
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A007318 * triangle with (1, 1, 2, 3, 4, 5,...) in the main diagonal and the rest zeros. |
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+0
2
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| 1, 1, 1, 1, 2, 2, 1, 3, 6, 3, 1, 4, 12, 12, 4, 1, 5, 20, 30, 20, 5, 1, 6, 30, 60, 60, 30, 6, 1, 7, 42, 105, 140, 105, 42, 7, 1, 8, 56, 168, 280, 280, 168, 56, 8, 1, 9, 72, 252, 504, 630, 504, 252, 72, 9
(list; table; graph; listen)
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OFFSET
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0,5
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COMMENT
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Row sums = A005183: (1, 2 5, 13, 33, 81, 193,...)
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EXAMPLE
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First few rows of the triangle are:
1;
1, 1;
1, 2, 2;
1, 3, 6, 3;
1, 4, 12, 12, 4;
1, 5, 20, 30, 20, 5;
1, 6, 30, 60, 60, 30, 6;
1, 7, 42, 105, 140, 105, 42, 7;
...
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CROSSREFS
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Cf. A005183.
Sequence in context: A117919 A068956 A124842 this_sequence A094436 A094441 A107230
Adjacent sequences: A134396 A134397 A134398 this_sequence A134400 A134401 A134402
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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), Oct 23 2007
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