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.

A034428 E.g.f.: 1 - (1-x)*(tan(x) + sec(x)).

Table of values

n a(n)
0 0
1 0
2 1
3 1
4 3
5 9
6 35
7 155
8 791
9 4529
10 28839
11 201939
12 1542739
13 12767689
14 113794603
15 1086657403
16 11068604847
17 119790363489
18 1372696498127
19 16603828720547
20 211406514019115
21 2826296899863929
22 39584082775592211
23 579600224535319371

List of values

[0, 0, 1, 1, 3, 9, 35, 155, 791, 4529, 28839, 201939, 1542739, 12767689, 113794603, 1086657403, 11068604847, 119790363489, 1372696498127, 16603828720547, 211406514019115, 2826296899863929, 39584082775592211, 579600224535319371]

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

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