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 A099406 #8 Jan 08 2025 11:52:25
%S A099406 4,3,2,13,9,72,56,51,42,34,32,27,24,23,21,186,167,162,148,14,136,126,
%T A099406 12,112,103,99,97,93,91,88,782,76,725,715,67,66,633,61,596,575,556,55,
%U A099406 521,516,506,501,472,447,44,435,428,417,414,397,388,38,371,368,36,355,353
%N A099406 Decimal part of 1/a(n) starts with the n-th prime (leading zeros excluded).
%F A099406 a(n) = A052039(prime(n)). - _Michel Marcus_, Jan 08 2025
%e A099406 a(1)= 4 -> 1/4 =0.{2}500000...
%e A099406 a(2)= 3 -> 1/3 =0.{3}333333...
%e A099406 a(3)= 2 -> 1/2 =0.{5}000000...
%e A099406 a(4)=13 -> 1/13=0.0{7}69230...
%e A099406 a(100)=1846 -> 1/1846=0.000{541}712 and 541 is the 100th prime.
%Y A099406 Cf. A034057, A052039.
%K A099406 easy,nonn,base
%O A099406 1,1
%A A099406 _Gil Broussard_, Nov 17 2004