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