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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.

A318005 E.g.f.: A(x) satisfies: cos(A(x)) + sin(A(x)) = 1/(cos(x) - sin(x)).

Table of values

n a(n)
1 1
2 4
3 24
4 224
5 2880
6 48064
7 989184
8 24218624
9 687083520
10 22151148544
11 799546834944
12 31934834253824
13 1398132497448960
14 66573473015578624
15 3425078687463112704
16 189331392774496845824
17 11190654534195295027200
18 704262689221037166690304
19 47015904809670036594622464
20 3318579148264602406039322624

List of values

[1, 4, 24, 224, 2880, 48064, 989184, 24218624, 687083520, 22151148544, 799546834944, 31934834253824, 1398132497448960, 66573473015578624, 3425078687463112704, 189331392774496845824, 11190654534195295027200, 704262689221037166690304, 47015904809670036594622464, 3318579148264602406039322624]

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

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