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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.

A180680 Expansion of e.g.f. (1 - sqrt(1 - 4*LambertW(x)))/2.

Table of values

n a(n)
1 1
2 0
3 9
4 8
5 705
6 2304
7 154945
8 1097088
9 67699233
10 821657600
11 49591224441
12 901894072320
13 54967757171041
14 1372143152529408
15 86054992196720625
16 2772416395058315264
17 181071792859314812865
18 7195828128158173888512
19 493215560390253143533033

List of values

[1, 0, 9, 8, 705, 2304, 154945, 1097088, 67699233, 821657600, 49591224441, 901894072320, 54967757171041, 1372143152529408, 86054992196720625, 2772416395058315264, 181071792859314812865, 7195828128158173888512, 493215560390253143533033]

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

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