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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.

A047691 Numerators of coefficients in Taylor series for exp(tan(x)).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 3
5 37
6 59
7 137
8 871
9 41641
10 325249
11 3887
12 35797
13 241586893
14 24362249
15 5721418891
16 342232522657
17 4315903789009
18 8224154352439
19 2832484672207
20 23157229065769
21 183184249105857781
22 9926476934520521
23 2154299222076719401

List of values

[1, 1, 1, 1, 3, 37, 59, 137, 871, 41641, 325249, 3887, 35797, 241586893, 24362249, 5721418891, 342232522657, 4315903789009, 8224154352439, 2832484672207, 23157229065769, 183184249105857781, 9926476934520521, 2154299222076719401]

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

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