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 A175815 #7 May 15 2013 22:20:40
%S A175815 18,52,54,58,60,62,230,234,236,242,290,292,294,298,3668,3670,3674,
%T A175815 3676,3680,3682,3714,3716,3760,3762,3774,3776,3796,3798,3816,3818,
%U A175815 3826,3828,3832,3838,3840,3866,3868,3872,3874,3876,4148,4186,4190,6018,6024,6036
%N A175815 Numbers n such that the first n decimal digits of Euler's constant gamma contain equal numbers of even and odd decimal digits.
%C A175815 Conjecturally infinite. - _Charles R Greathouse IV_, May 15 2013
%e A175815 18 is in the sequence because, the first 18 digits of gamma = .577215664901532860 have 9 even and 9 odd digits.
%t A175815 L= Rest@FoldList[ Plus, 0, (-1)^First@ RealDigits[EulerGamma, 10, 7000]] ;Do[If [L[[n]]==0,Print[n]],{n,7000}]
%Y A175815 Cf. A175794
%K A175815 nonn,base
%O A175815 1,1
%A A175815 _Michel Lagneau_, Sep 09 2010