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A233772
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Triangle read by rows in which row n lists n together with the proper divisors of n multiplied by -1 in increasing order.
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1
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1, 2, -1, 3, -1, 4, -2, -1, 5, -1, 6, -3, -2, -1, 7, -1, 8, -4, -2, -1, 9, -3, -1, 10, -5, -2, -1, 11, -1, 12, -6, -4, -3, -2, -1, 13, -1, 14, -7, -2, -1, 15, -5, -3, -1, 16, -8, -4, -2, -1, 17, -1
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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COMMENTS
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The same as A056538 but with all terms multiplied by -1 from the second column.
The sum of row n gives the deficiency of n.
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LINKS
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EXAMPLE
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Written as an irregular triangle in which row n has length A000005(n) the sequence begins:
1;
2, -1;
3, -1;
4, -2, -1;
5, -1;
6, -3, -2, -1;
7, -1;
8, -4, -2, -1;
9, -3, -1;
10, -5, -2, -1;
11, -1;
12, -6, -4, -3, -2, -1;
...
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CROSSREFS
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KEYWORD
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sign,tabf
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AUTHOR
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STATUS
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approved
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