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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.

A049215 Scaled coefficients of (arctanh x)^4.

Table of values

n a(n)
0 1
1 40
2 2464
3 229760
4 30633856
5 5561407488
6 1322489954304
7 399463775797248
8 149519094622027776
9 67960463478175825920
10 36884466463352967659520
11 23566236397584291201024000
12 17511732541318788803985408000

List of values

[1, 40, 2464, 229760, 30633856, 5561407488, 1322489954304, 399463775797248, 149519094622027776, 67960463478175825920, 36884466463352967659520, 23566236397584291201024000, 17511732541318788803985408000]

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

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