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A174875
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Triangle read by rows: R(n,k)= sigma(n) mod tau(k), where sigma(.) is the sum of divisors and tau(.) the number of divisors.
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1
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0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 1, 1, 0, 1, 3, 1, 3, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 2, 0, 2, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 4, 0, 0, 0, 2, 0, 2, 0, 2, 2, 2, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,25
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LINKS
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EXAMPLE
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The triangle starts in row n=1 with columns 1<=k<=n as:
0;
0,1;
0,0,0;
0,1,1,1;
0,0,0,0,0;
0,0,0,0,0,0;
0,0,0,2,0,0,0;
0,1,1,0,1,3,1,3;
0,1,1,1,1,1,1,1,1;
0,0,0,0,0,2,0,2,0,2;
0,0,0,0,0,0,0,0,0,0,0;
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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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