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A276222 Position of n^s in the joint ranking of {h} and {k^s}, h >= 1, k >= 2, s = golden ratio = (1+sqrt(5))/2. 1

%I #4 Sep 12 2016 17:10:10

%S 4,7,12,17,23,29,35,42,50,58,66,75,84,93,103,113,124,135,146,157,169,

%T 181,194,206,219,233,246,260,274,288,303,318,333,349,364,380,396,413,

%U 430,446,464,481,499,517,535,553,572,590,610,629,648,668,688,708,728

%N Position of n^s in the joint ranking of {h} and {k^s}, h >= 1, k >= 2, s = golden ratio = (1+sqrt(5))/2.

%H Clark Kimberling, <a href="/A276222/b276222.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) = n + floor(n^s), n >= 2; the complement is given by n + floor(n^(1/s)), n >= 1.

%e The first numbers in the joint ranking are

%e 1 < 2 < 3 < 2^s < 4 < 5 < 3^s < 6 < 7 < 8 < 9 < 4^s, so that a(n) = (4,7,12,...).

%t z = 150; s = N[GoldenRatio, 100];

%t u = Table[n + Floor[n^s], {n, 2, z}];

%t v = Table[n + Floor[n^(1/s)], {n, 1, z^s}];

%t w = Union[u, v]; Flatten[Table[Position[w, u[[n]]], {n, 1, z}]]

%Y Cf. A276219, A276220.

%K nonn,easy

%O 1,1

%A _Clark Kimberling_, Sep 06 2016

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Last modified April 27 03:38 EDT 2024. Contains 372009 sequences. (Running on oeis4.)