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A152738 a(n) = floor((n^2)/phi). 4
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..5000

MATHEMATICA

a[n_]:=Floor[(n^2)/GoldenRatio];

PROG

(PARI) a(n)=n^2\((1+sqrt(5))/2) \\ Charles R Greathouse IV, Jul 29 2011

(Magma) phi:=(1+Sqrt(5))/2; [Floor(n^2/phi): n in [0..30]]; // G. C. Greubel, Sep 01 2018

CROSSREFS

Cf. A014217, A152737, A032616, A032635.

Sequence in context: A184535 A033096 A195014 * A022941 A320259 A007982

Adjacent sequences: A152735 A152736 A152737 * A152739 A152740 A152741

KEYWORD

nonn

AUTHOR

Vladimir Joseph Stephan Orlovsky, Dec 12 2008

EXTENSIONS

Offset corrected by B. D. Swan, Jan 03 2009

STATUS

approved

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Last modified December 3 09:50 EST 2022. Contains 358517 sequences. (Running on oeis4.)