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 A286853 #14 Aug 06 2017 23:03:03
%S A286853 198,22,110,220,110,220,110,36,184,110,220,110,6,60,154,110,220,110,
%T A286853 120,100,110,88,132,110,220,44,66,48,172,110,220,110,220,66,44,220,
%U A286853 110,132,88,110,220,110,70,150,110,6,148,66,110,220,110,220,110,220,110,220,110,22,198,32,78,198,22,110,220,110,210,10,30,80,220,110,220,110,66,154,110,220,110
%N A286853 First differences of A286854.
%C A286853 Empirical observations:
%C A286853 The values seem to be a subset of {2k: k=3..110}.
%C A286853 Segments of consecutive values sum up to 330, like: | 198,22,110 | 220,110 | 220,110 | 36,184,110 | 220,110 | 6,60,154,110 | ... - _Peter Luschny_, Aug 06 2017
%H A286853 Peter Luschny, <a href="/A286853/b286853.txt">Table of n, a(n) for n = 1..500</a>
%t A286853 Differences@Select[Range@9999,0!=Mod[Numerator@BernoulliB[2#],#]&&MemberQ[{1,5},Mod[#,6]]&]
%Y A286853 Cf. A286854.
%K A286853 nonn
%O A286853 1,1
%A A286853 _Bill Gosper_, Aug 01 2017