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A127168
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Triangle read by rows: square of A126988.
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1
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1, 4, 1, 6, 0, 1, 12, 4, 0, 1, 10, 0, 0, 0, 1, 24, 6, 4, 0, 0, 1, 14, 0, 0, 0, 0, 0, 1, 32, 12, 0, 4, 0, 0, 0, 1, 27, 0, 6, 0, 0, 0, 0, 0, 1, 40, 10, 0, 0, 4, 0, 0, 0, 0, 1, 22, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 72, 24, 12, 6, 0, 4, 0, 0, 0, 0, 0, 1, 26, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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COMMENTS
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Row sums = A060640: (1, 5, 7, 17, 11, 35, 15, 49...) Left column = A038040, d(n)*n: (1, 4, 6, 12, 10, 24, 14, 32, 27, 40...). A127168 * A008683 = A018804, (1, 3, 5, 8, 9, 15...); where A008683 = the Mobius sequence.
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LINKS
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EXAMPLE
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First few rows of the triangle are:
1;
4, 1;
6, 0, 1;
12, 4, 0, 1
10, 0, 0, 0, 1
24, 6, 4, 0, 0, 1
14, 0, 0, 0, 0, 0, 1;
32, 12, 0, 4, 0, 0, 0, 1;
...
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CROSSREFS
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KEYWORD
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AUTHOR
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EXTENSIONS
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a(20) = 1 inserted and more terms from Georg Fischer, May 31 2023
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STATUS
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approved
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