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a(n) = floor((n+1)*3^(1/3)) - floor(n*3^(1/3)).
(Magma)
A081129:= func< n | Floor((n+1)*3^(1/3)) - Floor(n*3^(1/3)) >;
[A081129(n): n in [0..120]]; // G. C. Greubel, Jan 15 2024
(SageMath)
def A081129(n): return floor((n+1)*3^(1/3)) - floor(n*3^(1/3))
[A081129(n) for n in range(121)] # G. C. Greubel, Jan 15 2024
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Harvey P. Dale, <a href="/A081129/b081129.txt">Table of n, a(n) for n = 0..1000</a>
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Differences[Floor[Range[0, 110]Surd[3, 3]]] (* Harvey P. Dale, Apr 06 2022 *)
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_Benoit Cloitre (benoit7848c(AT)orange.fr), _, Apr 16 2003
nonn,new
nonn
Benoit Cloitre (abmtbenoit7848c(AT)wanadooorange.fr), Apr 16 2003