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Search: id:A128138
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| 1, 0, 2, 0, 1, 3, 0, 1, 2, 4, 0, 1, 2, 3, 5, 0, 1, 2, 3, 4, 6, 0, 1, 2, 3, 4, 5, 7, 0, 1, 2, 3, 4, 5, 6, 8, 0, 1, 2, 3, 4, 5, 6, 7, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 10
(list; table; graph; listen)
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OFFSET
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1,3
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COMMENT
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Row sums = A000124, the Lazy Caterer's sequence: (1, 2, 4, 7, 11, 16, 22, 29,...).
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FORMULA
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A000012 * A128132 as infinite lower triangular matrices. a(1) = 1; row n = 0, 1,..., n; in which the (n-1) is deleted.
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EXAMPLE
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First few rows of the triangle are:
1;
0, 2;
0, 1, 3;
0, 1, 2, 4;
0, 1, 2, 3, 5;
0, 1, 2, 3, 4, 6;
0, 1, 2, 3, 4, 5, 7;
...
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CROSSREFS
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Cf. A000012, A128132, A000124.
Sequence in context: A129503 A112760 A096087 this_sequence A029324 A029318 A029297
Adjacent sequences: A128135 A128136 A128137 this_sequence A128139 A128140 A128141
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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), Feb 16 2007
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