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.

A009244 Expansion of e.g.f.: exp(tan(x))/cos(x).

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 20
5 92
6 448
7 2688
8 17296
9 127312
10 1013600
11 8850336
12 83547584
13 845380928
14 9196867072
15 105911556096
16 1301697829120
17 16814357324032
18 230093807905280
19 3294279618252288
20 49636887216382976

List of values

[1, 1, 2, 6, 20, 92, 448, 2688, 17296, 127312, 1013600, 8850336, 83547584, 845380928, 9196867072, 105911556096, 1301697829120, 16814357324032, 230093807905280, 3294279618252288, 49636887216382976]

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

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