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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.

A380646 Expansion of e.g.f. (1/x) * Series_Reversion( x * exp(-2*x)/(1 + x)^2 ).

Table of values

n a(n)
0 1
1 4
2 46
3 932
4 27568
5 1080432
6 52916176
7 3115326496
8 214470890496
9 16914853191680
10 1504252282653184
11 148956086481767424
12 16256865070022066176
13 1938988214539948730368
14 250943399365390735104000
15 35026523834624205803491328
16 5245178283068781060488298496
17 838841884254236846183525646336

List of values

[1, 4, 46, 932, 27568, 1080432, 52916176, 3115326496, 214470890496, 16914853191680, 1504252282653184, 148956086481767424, 16256865070022066176, 1938988214539948730368, 250943399365390735104000, 35026523834624205803491328, 5245178283068781060488298496, 838841884254236846183525646336]

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

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