a(n) is the smallest k such that the sum of the first k terms of the composite-harmonic series, Sum_{j=1..k} 1/(j-th composite), is > n.
A074631
a(n) is the smallest k such that the sum of the first k terms of the composite-harmonic series, Sum_{j=1..k} 1/(j-th composite), is > n.
Terms
- a(0) =9a(1) =44a(2) =168a(3) =587a(4) =1940a(5) =6192a(6) =19285a(7) =59010a(8) =178122a(9) =531923a(10) =1574706a(11) =4628338a(12) =13521477a(13) =39299115a(14) =113712434a(15) =327752962a(16) =941457955a(17) =2696114317a(18) =7700146599a(19) =21938239766
External references
- oeis: A074631