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Search: id:A127465
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| 1, 1, 2, 2, 0, 3, 2, 2, 0, 4, 4, 0, 0, 0, 5, 2, 4, 3, 0, 0, 6, 6, 0, 0, 0, 0, 0, 7, 4, 4, 0, 4, 0, 0, 0, 8, 6, 0, 6, 0, 0, 0, 0, 0, 9, 4, 8, 0, 0, 5, 0, 0, 0, 0, 1, 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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Left column = phi(n), A000010: (1, 1, 2, 2, 4, 2,...) Row sums = A018804: (1, 3, 5, 8, 9, 15...)
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FORMULA
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A054523 * M as infinite lower triangular matrices, M = (1, 2, 3,...) in the main diagonal and the rest zeros.
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EXAMPLE
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First few rows of the triangle are:
1;
1, 2;
2, 0, 3;
2, 2, 0, 4;
4, 0, 0, 0, 5;
2, 4, 3, 0, 0, 6;
6, 0, 0, 0, 0, 0, 7;
4, 4, 0, 4, 0, 0, 0, 8;
...
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CROSSREFS
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Cf. A054523, A000010, A018804.
Sequence in context: A093949 A108807 A129236 this_sequence A127899 A128615 A087508
Adjacent sequences: A127462 A127463 A127464 this_sequence A127466 A127467 A127468
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KEYWORD
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nonn,tabl,uned
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Jan 15 2007
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