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 A331015 #25 Feb 22 2020 07:01:11
%S A331015 57,16939,767158,5505709,6674196,7418985,18873720
%N A331015 Self-locating strings within Euler-Mascheroni Constant (gamma), strings k at position k (taking gamma offset 1).
%C A331015 The first self-locating digits of gamma are 57, and the first digits of gamma are 57.
%C A331015 A near-miss '04305165' begins at position 4305165.
%e A331015 57 is a term because the 57th digit is 5 and the 58th digit is 7.
%t A331015 dgamma = RealDigits[EulerGamma, 10, 1000010][[1]]; Select[Range[1000000], FromDigits[Take[dgamma, {#, # - 1 + IntegerLength[#]}]] == # &] (* _Vaclav Kotesovec_, Feb 18 2020 *)
%Y A331015 Euler-Mascheroni constant digits: A001620.
%Y A331015 Self-locating digits of Pi: A057679, A064810 and e: A205648.
%K A331015 nonn,base,more
%O A331015 1,1
%A A331015 _S. Alwin Mao_, Feb 12 2020