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Search: id:A129559
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| 1, 2, 1, 2, 0, 1, 4, 2, 0, 1, 4, 0, 0, 0, 1, 4, 2, 2, 0, 0, 1, 6, 0, 0, 0, 0, 0, 1, 8, 4, 0, 2, 0, 0, 0, 1, 6, 0, 2, 0, 0, 0, 0, 0, 1, 8, 4, 0, 0, 2, 0, 0, 0, 0, 1
(list; table; graph; listen)
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OFFSET
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1,2
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COMMENT
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row sums = A129266: (1, 3, 3, 7, 5, 9, 7, 15,...). Left column = phi(2*n), A062570: (1, 2, 2, 4, 4, 4, 6, 8,...).
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FORMULA
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A054523 * A115361 as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
2, 1;
2, 0, 1;
4, 2, 0, 1;
4, 0, 0, 0, 1;
4, 2, 2, 0, 0, 1;
6, 0, 0, 0, 0, 0, 1;
8, 4, 0, 2, 0, 0, 0, 1;
...
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CROSSREFS
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Cf. A054523, A115361, A129266, A062570.
Sequence in context: A143365 A099505 A156837 this_sequence A129680 A118231 A166453
Adjacent sequences: A129556 A129557 A129558 this_sequence A129560 A129561 A129562
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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), Apr 20 2007
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