OFFSET
1,1
COMMENTS
Or, smallest proper divisor of m-th triangular number is prime(n).
The curve is bimodal. Why? - T. D. Noe, Jun 07 2013
EXAMPLE
MATHEMATICA
nn = 50; t = Table[0, {nn}]; tri = 1; n = 1; found = 0; While[found < nn, n++; tri = tri + n; p = FactorInteger[tri][[1, 1]]; pi = PrimePi[p]; If[pi <= nn && t[[pi]] == 0, t[[pi]] = n; found++]]; t (* T. D. Noe, Jun 07 2013 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov, Jun 06 2013
STATUS
approved