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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.

A380555 E.g.f. A(x) satisfies A(x) = log( 1 + x * cos(2*A(x)) ).

Table of values

n a(n)
1 1
2 -1
3 -10
4 90
5 364
6 -17760
7 85280
8 5447120
9 -116082720
10 -1709304480
11 123520217600
12 -637137072000
13 -136024779843200
14 3988924415257600
15 131963952741504000
16 -11250603940363008000
17 19125068757338752000
18 28119635304260378112000
19 -943657308179458552576000
20 -59184868918118854443520000

List of values

[1, -1, -10, 90, 364, -17760, 85280, 5447120, -116082720, -1709304480, 123520217600, -637137072000, -136024779843200, 3988924415257600, 131963952741504000, -11250603940363008000, 19125068757338752000, 28119635304260378112000, -943657308179458552576000, -59184868918118854443520000]

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

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