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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A026313 Numbers k such that |sin(k)*sin(k+2)| < (sin(k+1))^2.

Original entry on oeis.org

0, 1, 3, 4, 6, 7, 10, 13, 14, 16, 17, 19, 20, 22, 23, 25, 26, 28, 29, 32, 35, 36, 38, 39, 41, 42, 44, 45, 47, 48, 50, 51, 54, 57, 58, 60, 61, 63, 64, 66, 67, 69, 70, 72, 73, 76, 79, 80, 82, 83, 85, 86, 88, 89, 91, 92, 94, 95, 98, 101, 102, 104, 105, 107, 108, 110, 111, 113, 114
Offset: 1

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Keywords

Crossrefs

Cf. A117672.

Programs

  • Mathematica
    Select[Range[120], Abs[Sin[ # ]*Sin[ # + 2]] < Sin[ # + 1]^2 &] (* Stefan Steinerberger, Apr 12 2006 *)

Extensions

More terms from Stefan Steinerberger, Apr 12 2006
Missing a(1)=0 inserted by Sean A. Irvine, Sep 25 2019
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