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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.

A380945 Expansion of e.g.f. (1/x) * Series_Reversion( x * (1 - x)^2 * exp(-2*x) ).

Table of values

n a(n)
0 1
1 4
2 50
3 1124
4 37192
5 1637232
6 90278176
7 5992556320
8 465599728512
9 41470892979200
10 4167168740195584
11 466428111222196224
12 57556315795242096640
13 7763511917730857967616
14 1136484206117494859980800
15 179453678311835212416585728
16 30404317385796994658988752896

List of values

[1, 4, 50, 1124, 37192, 1637232, 90278176, 5992556320, 465599728512, 41470892979200, 4167168740195584, 466428111222196224, 57556315795242096640, 7763511917730857967616, 1136484206117494859980800, 179453678311835212416585728, 30404317385796994658988752896]

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

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