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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.

A227278 E.g.f.: T(T(T(x))), where T(x) = -LambertW(-x) is Euler's tree function (A000169).

Table of values

n a(n)
1 1
2 6
3 63
4 948
5 18645
6 454158
7 13221075
8 448434136
9 17386204761
10 759123121050
11 36882981687519
12 1974616464026484
13 115536647641839333
14 7336947898087080406
15 502660682907018997755
16 36961205206337621142192
17 2903732354672613314658225
18 242753209611983811853905330

List of values

[1, 6, 63, 948, 18645, 454158, 13221075, 448434136, 17386204761, 759123121050, 36882981687519, 1974616464026484, 115536647641839333, 7336947898087080406, 502660682907018997755, 36961205206337621142192, 2903732354672613314658225, 242753209611983811853905330]

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

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