OFFSET
1,1
COMMENTS
A prime transform of A051731.
EXAMPLE
First few rows of the triangle are:
2;
3, 3;
5, 0, 5;
7, 7, 0, 7;
11, 0, 0, 0, 11;
13, 13, 13, 0, 0, 13;
...
MAPLE
A127640 := proc(n, m) if m < n then 0; else ithprime(n) ; fi ; end: A051731 := proc(n, k) if n mod k = 0 then 1 ; else 0 ; fi ; end: A127641 := proc(n, m) add( A127640(n, k)*A051731(k, m), k=1..n) ; end: for n from 1 to 15 do for m from 1 to n do printf("%d, ", A127641(n, m)) ; od ; od ; # R. J. Mathar, May 19 2007
CROSSREFS
KEYWORD
AUTHOR
Gary W. Adamson, Jan 21 2007
EXTENSIONS
More terms from R. J. Mathar, May 19 2007
STATUS
approved