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 A332492 #19 Feb 22 2020 07:03:11
%S A332492 7,23,52,54,86,303,389,5112,60392,87491,94788,97115,616916,672938066
%N A332492 Self-locating numbers within the decimal expansion of log(2): strings k beginning at position k (first digit after decimal point is position 2).
%C A332492 a(15) > 10^9.
%C A332492 52 and 54 are self-locating numbers which appear consecutively in log(2) = 0.693...5254....
%e A332492 For 0.693147..., if 6 appears at position 2, then 7 appears at position 7.
%t A332492 dlog2 = RealDigits[Log[2], 10, 1000010][[1]]; Select[Range[2, 1000000], FromDigits[Take[dlog2, {# - 1, # - 2 + IntegerLength[#]}]] == # &] (* _Vaclav Kotesovec_, Feb 18 2020 *)
%Y A332492 Decimal expansion of log(2): A002162.
%Y A332492 Self-locating digits of Pi: A057679, A153220.
%K A332492 nonn,base,more
%O A332492 1,1
%A A332492 _S. Alwin Mao_, Feb 14 2020