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Search: id:A130211
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| 1, 2, 1, 3, 2, 2, 4, 3, 2, 2, 5, 4, 4, 4, 4, 6, 5, 4, 2, 2, 2, 7, 6, 6, 6, 6, 6, 6, 8, 7, 6, 6, 4, 4, 4, 4, 9, 8, 8, 6, 6, 6, 6, 6, 6, 10, 9, 8, 8, 8, 4, 4, 4, 4, 4
(list; table; graph; listen)
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OFFSET
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1,2
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COMMENT
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Right border = A000010, phi(n): (1, 1, 2, 2, 4, 2, 6,...). Row sums = A057660: (1, 3, 7, 11, 21, 21, 43, 43,...). A130212 = A000012 * A054522.
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FORMULA
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A054522 * A000012 as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
2, 1;
3, 2, 2;
4, 3, 2, 2;
5, 4, 4, 4, 4;
6, 5, 4, 2, 2, 2;
7, 6, 6, 6, 6, 6, 6;
8, 7, 6, 6, 4, 4, 4, 4;
...
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CROSSREFS
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Cf. A000010, A054522, A130212, A057660.
Sequence in context: A029281 A126792 A097367 this_sequence A102364 A132923 A144329
Adjacent sequences: A130208 A130209 A130210 this_sequence A130212 A130213 A130214
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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 17 2007
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