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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.

A295267 Expansion of e.g.f. 2/(1 + sqrt(1 + 4*LambertW(-x))).

Table of values

n a(n)
0 1
1 1
2 6
3 63
4 952
5 18885
6 465696
7 13764667
8 475039104
9 18767660553
10 835805555200
11 41442148754391
12 2264776308946944
13 135268340058044557
14 8767315076546568192
15 612911076907734961875
16 45973645939542007054336
17 3683096368557198711874833
18 313878687736263437290438656

List of values

[1, 1, 6, 63, 952, 18885, 465696, 13764667, 475039104, 18767660553, 835805555200, 41442148754391, 2264776308946944, 135268340058044557, 8767315076546568192, 612911076907734961875, 45973645939542007054336, 3683096368557198711874833, 313878687736263437290438656]

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

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