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A127504
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Triangle T(n,k) = phi(n) if k|n, =0 otherwise.
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0
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1, 1, 1, 2, 0, 2, 2, 2, 0, 2, 4, 0, 0, 0, 4, 2, 2, 2, 0, 0, 2, 6, 0, 0, 0, 0, 0, 6, 4, 4, 0, 4, 0, 0, 0, 4, 6, 0, 6, 0, 0, 0, 0, 0, 6, 4, 4, 0, 0, 4, 0, 0, 0, 0, 4
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OFFSET
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1,4
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LINKS
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FORMULA
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EXAMPLE
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First few rows of the triangle are:
1;
1, 1;
2, 0, 2;
2, 2, 0, 2;
4, 0, 0, 0, 4;
2, 2, 2, 0, 0, 2;
6, 0, 0, 0, 0, 0, 6;
4, 4, 0, 4, 0, 0, 0, 4;
...
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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