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A279631 Coefficients in the expansion of ([s] + [2s]x + [3s]x^2 + ...)/([r] + [2r]x + [3r]x^2 + ...); [ ] = floor, r = sqrt(2), s = r/(1-r). 1

%I #6 Dec 21 2016 10:48:03

%S 3,0,-2,2,0,-2,4,-4,-2,10,-10,0,14,-24,16,18,-56,54,10,-102,142,-54,

%T -154,332,-256,-158,666,-768,90,1136,-1918,1086,1510,-4144,3912,814,

%U -7760,10692,-3690,-12058,24840,-18478,-12628,50292,-57022,4864,87244,-143424

%N Coefficients in the expansion of ([s] + [2s]x + [3s]x^2 + ...)/([r] + [2r]x + [3r]x^2 + ...); [ ] = floor, r = sqrt(2), s = r/(1-r).

%H Clark Kimberling, <a href="/A279631/b279631.txt">Table of n, a(n) for n = 0..1000</a>

%F G.f.: ([s] + [2s]x + [3s]x^2 + ...)/([r] + [2r]x + [3r]x^2 + ...); [ ] = floor, r = sqrt(2), s = r/(1-r).

%t z = 100;

%t r = Sqrt[2]; f[x_] := f[x] = Sum[Floor[r*(k + 1)] x^k, {k, 0, z}];

%t s = r/(r - 1); g[x_] := g[x] = Sum[Floor[s*(k + 1)] x^k, {k, 0, z}]

%t CoefficientList[Series[g[x]/f[x], {x, 0, z}], x]

%Y Cf. A001951, A001952.

%K sign,easy

%O 0,1

%A _Clark Kimberling_, Dec 18 2016

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Last modified April 18 04:56 EDT 2024. Contains 371767 sequences. (Running on oeis4.)