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 A276868 #9 Sep 26 2016 21:38:36
%S A276868 4,5,4,5,5,4,5,4,5,5,4,5,5,4,5,4,5,5,4,5,4,5,5,4,5,5,4,5,4,5,5,4,5,5,
%T A276868 4,5,4,5,5,4,5,4,5,5,4,5,5,4,5,4,5,5,4,5,4,5,5,4,5,5,4,5,4,5,5,4,5,5,
%U A276868 4,5,4,5,5,4,5,4,5,5,4,5,5,4,5,4,5,5
%N A276868 First differences of the Beatty sequence A276855 for 3 + tau, where tau = golden ratio = (1 + sqrt(5))/2.
%H A276868 Clark Kimberling, <a href="/A276868/b276868.txt">Table of n, a(n) for n = 1..10000</a>
%F A276868 a(n) = floor(n*r) - floor(n*r - r), where r = 3 + tau, n >= 1.
%t A276868 z = 500; r = 3+GoldenRatio; b = Table[Floor[k*r], {k, 0, z}]; (* A276855 *)
%t A276868 Differences[b] (* A276868 *)
%Y A276868 Cf. A276855, A276887.
%K A276868 nonn,easy
%O A276868 1,1
%A A276868 _Clark Kimberling_, Sep 24 2016