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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.

A357719 Expansion of e.g.f. cos( 2 * log(1+x) ).

Table of values

n a(n)
0 1
1 0
2 -4
3 12
4 -28
5 40
6 200
7 -3360
8 35680
9 -357120
10 3644800
11 -38896000
12 437756800
13 -5206406400
14 65372153600
15 -864339840000
16 11991424640000
17 -173800340480000
18 2617640829440000
19 -40693929269760000
20 647089190924800000
21 -10383194262604800000

List of values

[1, 0, -4, 12, -28, 40, 200, -3360, 35680, -357120, 3644800, -38896000, 437756800, -5206406400, 65372153600, -864339840000, 11991424640000, -173800340480000, 2617640829440000, -40693929269760000, 647089190924800000, -10383194262604800000]

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

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