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.

A188796 Continued fraction of e+sqrt(1+e^2).

Original entry on oeis.org

5, 1, 1, 1, 1, 2, 7, 1, 7, 3, 1, 5, 2, 5, 1, 1, 1, 3, 6, 8, 26, 2, 1, 2, 3, 1, 1, 1, 13, 1, 10, 2, 5, 1, 10, 1, 1, 4, 1, 1, 2, 1, 3, 3, 2, 7, 1, 2, 21, 1, 1, 1, 1, 3, 2, 8, 9, 4, 2, 8, 1, 2, 1, 7, 1, 1, 19, 1, 4, 9, 1, 2, 1, 4, 2, 1, 4, 1, 4, 6, 2, 5, 10, 1, 2, 2, 10, 1, 1, 25, 1, 4, 13, 9, 2, 1, 2, 4, 8, 1, 1, 33, 1, 2, 1, 1, 1, 21, 1, 3, 1, 18, 1, 6, 43, 2, 1, 1, 1, 8
Offset: 0

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Author

Clark Kimberling, Apr 10 2011

Keywords

Comments

See A188640 for the origin of this constant.

Crossrefs

Cf. A188640 (decimal expansion), A188721.

Programs

  • Mathematica
    r = 2*E; t = (r + (4 + r^2)^(1/2))/2; FullSimplify[t]
    N[t, 130]
    RealDigits[N[t, 130]][[1]]
    ContinuedFraction[t, 120]

Formula

e+sqrt(1+e^2) = 5.614668.. = [5,1,1,1,1,2,7,1,7,3,1,5,2,5,1,1,1,...].

Extensions

Offset changed by Andrew Howroyd, Jul 07 2024