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Search: id:A127368
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| A127368 |
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Relative prime triangle, read by rows. |
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+0
7
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| 1, 1, 0, 1, 2, 0, 1, 0, 3, 0, 1, 2, 3, 4, 0, 1, 0, 0, 0, 5, 0, 1, 2, 3, 4, 5, 6, 0, 1, 0, 3, 0, 5, 0, 7, 0, 1, 2, 0, 4, 5, 0, 7, 8, 0, 1, 0, 3, 0, 0, 0, 7, 9, 0
(list; table; graph; listen)
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OFFSET
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1,5
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COMMENT
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Row sums = A023896, (reduced residue system mod n): (1, 1, 3, 4, 10, 6, 21,...). [From Gary W. Adamson (qntmpkt(AT)yahoo.com), Aug 27 2008]
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FORMULA
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T(n,k) = k if a relative prime of n; 0 otherwise. Replace the "1's" of A054521 with their corresponding column numbers; leaving the zeros.
Equals A054521 * A127648 as infinite lower triangular matrices. [From Gary W. Adamson (qntmpkt(AT)yahoo.com), Aug 27 2008]
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EXAMPLE
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Row 4 = (1, 0, 3, 0) since 1 and 3 are relative primes of 4.
First few rows of the triangle are:
1;
1, 0;
1, 2, 0;
1, 0, 3, 0;
1, 2, 3, 4, 0;
1, 0, 0, 0, 5, 0;
1, 2, 3, 4, 5, 6, 0;
...
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CROSSREFS
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Cf. A054521.
Sequence in context: A060689 A053119 A108045 this_sequence A112552 A048154 A134511
A054521, A023896 [From Gary W. Adamson (qntmpkt(AT)yahoo.com), Aug 27 2008]
Adjacent sequences: A127365 A127366 A127367 this_sequence A127369 A127370 A127371
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KEYWORD
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nonn,tabl,new
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Jan 11 2007
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