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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.

A009008 Expansion of e.g.f.: 1/cos(sin(x)) (even-indexed coefficients only).

Table of values

n a(n)
0 1
1 1
2 1
3 -23
4 -415
5 849
6 421089
7 16027897
8 -602344127
9 -137830187103
10 -6375572516543
11 1282077224074761
12 294398207479497377
13 6767832711454751473
14 -10535904130516747834591
15 -2468712006908963695579879
16 172926818125145929773139073

List of values

[1, 1, 1, -23, -415, 849, 421089, 16027897, -602344127, -137830187103, -6375572516543, 1282077224074761, 294398207479497377, 6767832711454751473, -10535904130516747834591, -2468712006908963695579879, 172926818125145929773139073]

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

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