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A127640 Triangle read by rows in which row n contains n-1 0's followed by prime(n). 7
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; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
A127641 = this sequence * A051731.
LINKS
EXAMPLE
First few rows of the triangle are:
2;
0, 3
0, 0, 5;
0, 0, 0, 7;
0, 0, 0, 0, 11;
...
MAPLE
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, May 19 2007
CROSSREFS
Sequence in context: A167990 A071391 A102390 * A113303 A080089 A322841
KEYWORD
nonn,tabl,easy
AUTHOR
Gary W. Adamson, Jan 21 2007
EXTENSIONS
More terms from R. J. Mathar, May 19 2007
STATUS
approved

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Last modified April 14 10:04 EDT 2024. Contains 371657 sequences. (Running on oeis4.)