A152738 a(n) = floor((n^2)/phi).
0, 0, 2, 5, 9, 15, 22, 30, 39, 50, 61, 74, 88, 104, 121, 139, 158, 178, 200, 223, 247, 272, 299, 326, 355, 386, 417, 450, 484, 519, 556, 593, 632, 673, 714, 757, 800, 846, 892, 940, 988, 1038, 1090, 1142, 1196, 1251, 1307, 1365, 1423, 1483, 1545, 1607, 1671
Offset: 0
Keywords
Links
- G. C. Greubel, Table of n, a(n) for n = 0..5000
Programs
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Magma
phi:=(1+Sqrt(5))/2; [Floor(n^2/phi): n in [0..30]]; // G. C. Greubel, Sep 01 2018
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Mathematica
a[n_]:=Floor[(n^2)/GoldenRatio];
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PARI
a(n)=n^2\((1+sqrt(5))/2) \\ Charles R Greathouse IV, Jul 29 2011
Extensions
Offset corrected by B. D. Swan, Jan 03 2009