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Search: id:A127472
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| 1, 2, 1, 3, 0, 2, 4, 3, 0, 2, 5, 0, 0, 0, 4, 6, 3, 4, 0, 0, 2, 7, 0, 0, 0, 0, 0, 6, 8, 7, 0, 6, 0, 0, 0, 4, 9, 0, 8, 0, 0, 0, 0, 0, 6, 10, 5, 0, 0, 8, 0, 0, 0, 0, 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 = phi(n), A000010; row sums = A062949: (1, 3, 5, 9, 9, 15, 13, 25,...) A127471 = A051731 * A054522
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FORMULA
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A054522 * A051731 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, 0, 2;
.4, 3, 0, 2;
.5, 0, 0, 0, 4;
.6, 3, 4, 0, 0, 2;
.7, 0, 0, 0, 0, 0, 6;
.8, 7, 0, 6, 0, 0, 0, 4;
....
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CROSSREFS
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Cf. A054522, A051731, A062948, A000010, A127471.
Sequence in context: A025642 A025643 A127478 this_sequence A004563 A146094 A098035
Adjacent sequences: A127469 A127470 A127471 this_sequence A127473 A127474 A127475
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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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