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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.

A173131 a(n) = (Cosh[(2n-1)ArcSinh[n]])^2.

Table of values

n a(n)
0 1
1 2
2 1445
3 19740250
4 1361599599377
5 298514762397852026
6 160545187370375075046277
7 179656719395983409634002348450
8 373368546362937441101158606899394625

List of values

[1, 2, 1445, 19740250, 1361599599377, 298514762397852026, 160545187370375075046277, 179656719395983409634002348450, 373368546362937441101158606899394625]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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