OFFSET
1,1
COMMENTS
a(18) > pi(5*10^10). - Robert Price, Dec 10 2013
MATHEMATICA
For[n = 1, n ≤ 17, n++, sum = 0; For[k = 1, k ≤ 10^6, k++, sum = sum + 1/Prime[k]; If[sum >= n/5, Print[Prime[k]]; Break[]]]]
Table[m = 1; s = 0; While[(s = s + 1/Prime[m]) < n/5, m++];
Prime[m], {n, 1, 17}] (* Robert Price, Mar 27 2019 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
James R. Buddenhagen, Mar 28 2005
EXTENSIONS
a(1)-a(2) and a(16)-a(17) from Robert Price, Dec 10 2013
STATUS
approved