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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.

A369488 Expansion of (1/x) * Series_Reversion( x / (1-x)^2 * (1-x-x^2)^3 ).

Table of values

n a(n)
0 1
1 1
2 5
3 20
4 101
5 522
6 2860
7 16115
8 93200
9 549286
10 3288633
11 19942666
12 122243210
13 756188245
14 4714629930
15 29595888020
16 186903732003
17 1186606564605
18 7569137651545
19 48486925091800
20 311788811682494
21 2011863788481296
22 13022795014568290
23 84539592912435990

List of values

[1, 1, 5, 20, 101, 522, 2860, 16115, 93200, 549286, 3288633, 19942666, 122243210, 756188245, 4714629930, 29595888020, 186903732003, 1186606564605, 7569137651545, 48486925091800, 311788811682494, 2011863788481296, 13022795014568290, 84539592912435990]

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

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