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.

A285043 Expansion of cosh(3*arctanh(2*sqrt(x))).

Table of values

n a(n)
0 1
1 18
2 102
3 500
4 2310
5 10332
6 45276
7 195624
8 836550
9 3549260
10 14965236
11 62783448
12 262303132
13 1092063000
14 4533175800
15 18769219920
16 77539370310
17 319704052140
18 1315894618500
19 5407825361400
20 22193291140020

List of values

[1, 18, 102, 500, 2310, 10332, 45276, 195624, 836550, 3549260, 14965236, 62783448, 262303132, 1092063000, 4533175800, 18769219920, 77539370310, 319704052140, 1315894618500, 5407825361400, 22193291140020]

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

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