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Search: id:A143308
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| 1, 4, 2, 6, 3, 3, 12, 8, 4, 4, 10, 5, 5, 5, 5, 24, 18, 12, 6, 6, 6, 14, 7, 7, 7, 7, 7, 7, 32, 24, 16, 16, 8, 8, 8, 8, 27, 18, 18, 9, 9, 9, 9, 9, 9, 40, 30, 20, 20, 20, 10, 10, 10, 10, 10, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 72, 60, 48, 36, 24, 24, 12, 12, 12, 12, 12, 12
(list; table; graph; listen)
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OFFSET
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1,2
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COMMENT
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Row sums = A064987, n*sigma(n): (1, 6, 12, 28, 30, 72,...).
Left column = A038040, n*d(n): (1, 4, 6, 12, 10, 24,...).
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FORMULA
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Triangle read by rows, A127446 * A000012, 1<=k<=n. Given triangle A127446, partial sums of terms starting from the right.
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EXAMPLE
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First few rows of the triangle =
1;
4, 2;
6, 3, 3;
12, 8, 4, 4;
10, 5, 5, 5, 5;
24, 18, 12, 6, 6, 6;
14, 7, 7, 7, 7, 7, 7;
Row 4 = (12, 8, 4, 4) since row 4 of triangle A127446 = (4, 4, 0, 4).
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CROSSREFS
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Cf. A127446, A064987, A038040.
Sequence in context: A019719 A016694 A035505 this_sequence A163238 A097362 A129131
Adjacent sequences: A143305 A143306 A143307 this_sequence A143309 A143310 A143311
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KEYWORD
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nonn,tabl
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Aug 06 2008
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