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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A383692 a(n) = round(Chi(n)) where Chi(x) is the cosh integral function.

Original entry on oeis.org

1, 2, 5, 10, 20, 43, 96, 220, 519, 1246, 3036, 7480, 18599, 46596, 117478, 297780, 758319, 1938952, 4975454, 12807826, 33063593, 85572336, 221983185, 577057696, 1502975453, 3921470496, 10248248560, 26822559296, 70299597879, 184486604704, 484727787984
Offset: 1

Views

Author

Kritsada Moomuang, May 05 2025

Keywords

Comments

This sequence is almost the same as A383542, except at n = 0, where Chi(0) is undefined, and at n = 2, where Shi(2) = 2.50156... rounds to 3, while Chi(2) = 2.45266... rounds to 2.

Crossrefs

Cf. A383542.

Programs

  • Mathematica
    a[n_]:=Round[CoshIntegral[n]]; Array[a,31]
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