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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A183164 Least integer k such that k*arctan(n) and k*arctan(n+1) are separated by an integer.

Original entry on oeis.org

1, 5, 4, 3, 5, 7, 9, 11, 13, 19, 27, 41, 85, 2, 61, 43, 33, 29, 25, 23, 21, 19, 36, 17, 32, 15, 43, 28, 41, 13, 76, 50, 37, 24, 35, 46, 57, 101, 11, 97, 64, 53, 42, 31, 51, 71, 111, 20, 69, 49, 78, 29, 67, 105, 38, 47, 103, 56, 74, 83, 101, 128, 182, 299, 9
Offset: 1

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Author

Clark Kimberling, Dec 27 2010

Keywords

Comments

a(n) is the least positive integer for which there is a rational number H with denominator k for which n < tan(H) < n+1.

Crossrefs

Programs

  • Mathematica
    Table[k=1; While[Floor[k*ArcTan[n+1]]<=k*ArcTan[n], k++];k,{n,100}]
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