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.

A009393 Expansion of e.g.f. log(1+tanh(x))/exp(x).

Table of values

n a(n)
0 0
1 1
2 -3
3 6
4 -8
5 5
6 -7
7 70
8 -72
9 -1311
10 1309
11 49214
12 -49216
13 -2653547
14 2653545
15 196707438
16 -196707440
17 -19194804703
18 19194804701
19 2385684870742
20 -2385684870744
21 -367985503366779
22 367985503366777
23 68980888889771126
24 -68980888889771128

List of values

[0, 1, -3, 6, -8, 5, -7, 70, -72, -1311, 1309, 49214, -49216, -2653547, 2653545, 196707438, -196707440, -19194804703, 19194804701, 2385684870742, -2385684870744, -367985503366779, 367985503366777, 68980888889771126, -68980888889771128]