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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.

A380830 Expansion of e.g.f. (1/x) * Series_Reversion( x * exp(-3*x) / (1 + x) ).

Table of values

n a(n)
0 1
1 4
2 47
3 978
4 29769
5 1201728
6 60656679
7 3681441648
8 261337079601
9 21256149703680
10 1949700750690879
11 199146039242552064
12 22420399033075845177
13 2758645779752490872832
14 368321963942753147683575
15 53038788218443786432223232
16 8194316429830951008255159009
17 1352065789150879084276947222528

List of values

[1, 4, 47, 978, 29769, 1201728, 60656679, 3681441648, 261337079601, 21256149703680, 1949700750690879, 199146039242552064, 22420399033075845177, 2758645779752490872832, 368321963942753147683575, 53038788218443786432223232, 8194316429830951008255159009, 1352065789150879084276947222528]

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

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