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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.

A368961 Expansion of (1/x) * Series_Reversion( x * (1-x-x^2)^2 ).

Table of values

n a(n)
0 1
1 2
2 9
3 48
4 286
5 1820
6 12116
7 83334
8 587537
9 4223582
10 30840355
11 228111390
12 1705509981
13 12868775056
14 97867753424
15 749401318160
16 5772939358590
17 44708058004740
18 347879528717526
19 2718400037837988
20 21323471768334120
21 167844335760482220
22 1325332432687278960

List of values

[1, 2, 9, 48, 286, 1820, 12116, 83334, 587537, 4223582, 30840355, 228111390, 1705509981, 12868775056, 97867753424, 749401318160, 5772939358590, 44708058004740, 347879528717526, 2718400037837988, 21323471768334120, 167844335760482220, 1325332432687278960]

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

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