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Search: id:A127640
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| A127640 |
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Triangle read by rows in which row n contains n-1 0's followed by prime(n). |
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+0
7
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| 2, 0, 3, 0, 0, 5, 0, 0, 0, 7, 0, 0, 0, 0, 11, 0, 0, 0, 0, 0, 13, 0, 0, 0, 0, 0, 0, 17, 0, 0, 0, 0, 0, 0, 0, 19, 0, 0, 0, 0, 0, 0, 0, 0, 23, 0, 0, 0, 0, 0, 0, 0, 0, 0, 29, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 31, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 37, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 41, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
(list; table; graph; listen)
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OFFSET
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1,1
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COMMENT
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A127641 = this sequence * A051731
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EXAMPLE
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First few rows of the triangle are:
2;
0, 3
0, 0, 5;
0, 0, 0, 7;
0, 0, 0, 0, 11;
...
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MAPLE
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A127640 := proc(n, m) if m < n then 0; else ithprime(n) ; fi ; end: for n from 1 to 15 do for m from 1 to n do printf("%d, ", A127640(n, m)) ; od ; od ; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 19 2007
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CROSSREFS
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Cf. A127641, A127638, A127639, A051731.
Adjacent sequences: A127637 A127638 A127639 this_sequence A127641 A127642 A127643
Sequence in context: A141701 A071391 A102390 this_sequence A113303 A080089 A113290
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KEYWORD
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nonn,tabl,easy
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Jan 21 2007
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 19 2007
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