cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A277112 a(n) = floor(n*(1+sqrt(5))/Pi).

Original entry on oeis.org

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 69, 70
Offset: 0

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Examples

			For n = 1000 we have that floor(1000*(1+sqrt(5))/Pi) = floor(1000*1.0300724296...) = floor(1030.0724296...) so a(1000) = 1030.
		

Crossrefs

Complement of A277113.

Programs

  • Maple
    A277112:=n->floor(n*(1+sqrt(5))/Pi): seq(A277112(n), n=0..100); # Wesley Ivan Hurt, Oct 31 2016
  • Mathematica
    f[n_] := Floor[n*(1+Sqrt[5])/Pi]; Array[f, 100, 0]

Formula

a(n) = floor(n*(1+sqrt(5))/Pi).

A277113 a(n) = floor(n/(1-Pi/(sqrt(5)+1))).

Original entry on oeis.org

34, 68, 102, 137, 171, 205, 239, 274, 308, 342, 376, 411, 445, 479, 513, 548, 582, 616, 650, 685, 719, 753, 787, 822, 856, 890, 924, 959, 993, 1027, 1061, 1096, 1130, 1164, 1198, 1233, 1267, 1301, 1335, 1370, 1404, 1438, 1472, 1507, 1541, 1575, 1609, 1644, 1678
Offset: 1

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Author

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Comments

The goal is to generate a ratio near 1 from two well-known constants.

Examples

			For n = 10 we have that floor(10/(1-Pi/(sqrt(5)+1))) = floor(10/0.02919448...) = floor(342.5304983...) so a(10) = 342.
		

Crossrefs

Complement of A277112.

Programs

  • Maple
    A277113:=n->floor(n/(1-Pi/(sqrt(5)+1))): seq(A277113(n), n=1..100);
  • Mathematica
    f[n_] := Floor[n/(1-Pi/(Sqrt[5]+1))]; Array[f, 100, 1]
  • PARI
    a(n) = n\(1-Pi/(sqrt(5)+1)) \\ Michel Marcus, Oct 29 2016

Formula

a(n) = floor(n/(1-Pi/(sqrt(5)+1))).

Extensions

More terms from Michel Marcus, Oct 29 2016
Showing 1-2 of 2 results.