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.

A009264 Expansion of e.g.f.: exp(tanh(x))/cos(x).

Table of values

n a(n)
0 1
1 1
2 2
3 2
4 4
5 12
6 128
7 464
8 1296
9 336
10 85600
11 838752
12 4372160
13 -11036608
14 148860416
15 5128035072
16 54261590272
17 -109537337088
18 -1474575037952
19 68456854604288
20 1579094994228224
21 1239349299477504
22 -145025202842173440

List of values

[1, 1, 2, 2, 4, 12, 128, 464, 1296, 336, 85600, 838752, 4372160, -11036608, 148860416, 5128035072, 54261590272, -109537337088, -1474575037952, 68456854604288, 1579094994228224, 1239349299477504, -145025202842173440]

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

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