This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A073260 #8 Aug 29 2019 05:23:02
%S A073260 4,4,4,5,5,6,7,7,7,8,8,9,9
%N A073260 Length of FixedPointList leading to value of [10^n]-th composite number.
%C A073260 One plus the number of iterations necessary to reach the composite number using the formula in the program. - _Robert G. Wilson v_, Jul 23 2002
%F A073260 See program below.
%e A073260 n=10^11: the list= {100000000000, 104118054814, 104280509328, 104286914053, 104287166025, 104287176027, 104287176414, 104287176419}, its length including initial term is 8, so a(11)=8.
%t A073260 Table[Length[FixedPointList[10^w+PrimePi[ # ]+1&, 10^w]]-1, {w, 1, 11}]
%Y A073260 Cf. A064814, A065857, A002808, A073255-A073264.
%K A073260 nonn,more
%O A073260 1,1
%A A073260 _Labos Elemer_, Jul 22 2002
%E A073260 More terms from _Robert G. Wilson v_, Jul 23 2002