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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.

A274279 Expansion of e.g.f.: tanh(x*W(x)), where W(x) = LambertW(-x)/(-x).

Table of values

n a(n)
1 1
2 2
3 7
4 40
5 341
6 3936
7 57107
8 992384
9 20025385
10 459466240
11 11804134079
12 335571265536
13 10456512176189
14 354362575314944
15 12975301760361163
16 510462668072058880
17 21472710312090391889
18 961728814178702327808
19 45692671937666739799799
20 2295278998002033651875840
21 121545436687537993689631525
22 6767130413049423041105231872
23 395177438856180565803457658627
24 24152146710231984411570685870080

List of values

[1, 2, 7, 40, 341, 3936, 57107, 992384, 20025385, 459466240, 11804134079, 335571265536, 10456512176189, 354362575314944, 12975301760361163, 510462668072058880, 21472710312090391889, 961728814178702327808, 45692671937666739799799, 2295278998002033651875840, 121545436687537993689631525, 6767130413049423041105231872, 395177438856180565803457658627, 24152146710231984411570685870080]

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