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A127446
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Triangle T(n,k) = n*A051731(n,k) read by rows.
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4
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1, 2, 2, 3, 0, 3, 4, 4, 0, 4, 5, 0, 0, 0, 5, 6, 6, 6, 0, 0, 6, 7, 0, 0, 0, 0, 0, 7, 8, 8, 0, 8, 0, 0, 0, 8, 9, 0, 9, 0, 0, 0, 0, 0, 9, 10, 10, 0, 0, 10, 0, 0, 0, 0, 10, 11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11, 12, 12, 12, 12, 0, 12, 0, 0, 0, 0, 0, 12, 13, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 13, 14, 14, 0, 0, 0, 0, 14
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Replace the 1's in row n of A051731 with n's.
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FORMULA
| Row sums: sum_{k=1..n} T(n,k) = A038040(n).
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EXAMPLE
| First few rows of the triangle are:
1;
2, 2;
3, 0, 3;
4, 4, 0, 4;
5, 0, 0, 0, 5;
6, 6, 6, 0, 0, 6;
7, 0, 0, 0, 0, 0, 7;
...
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MAPLE
| A127446 := proc(n, k) if n mod k = 0 then n; else 0; fi; end: for n from 1 to 20 do for k from 1 to n do printf("%d, ", A127446(n, k)) ; od: od: # R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 08 2009
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CROSSREFS
| Cf. A038040, A051731.
Sequence in context: A125093 A103516 A129234 * A046157 A035167 A071448
Adjacent sequences: A127443 A127444 A127445 * A127447 A127448 A127449
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KEYWORD
| nonn,tabl,easy
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AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), Jan 14 2007
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EXTENSIONS
| Edited and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 08 2009
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