|
%I #16 Mar 27 2019 19:13:22
%S 1,1,1,2,2,3,4,6,10,16,29,59,140,400,1413,6467,40261,361139,4990906,
%T 114916199,4833601540
%N Smallest number m such that Sum_{k=1..m} 1/prime(k) >= n/6.
%C a(22) > 5*10^10. - _Robert Price_, Dec 10 2013
%t For[n = 1, n ≤ 17, n++, sum = 0; For[k = 1, k ≤ 10^6, k++, sum = sum + 1/Prime[k]; If[sum >= n/6, Print[k]; Break[]]]] (* _Robert Price_, Dec 09 2013 *)
%t Table[m = 1; s = 0; While[(s = s + 1/Prime[m]) < n/6, m++];
%t m, {n, 1, 17}] (* _Robert Price_, Mar 27 2019 *)
%Y Cf. A016088, A046024, A103591-A103600.
%K nonn
%O 1,4
%A _James R. Buddenhagen_, Mar 28 2005
%E a(2)-a(4) and a(19)-a(21) added by _Robert Price_, Dec 10 2013
|
