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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.

A291817 G.f. A(x) satisfies: A(x - 3*x*A(x)) = x + x*A(x).

Table of values

n a(n)
1 1
2 4
3 40
4 580
5 10312
6 209752
7 4707952
8 114128308
9 2946787192
10 80268150808
11 2290811949904
12 68149759850680
13 2105074730357968
14 67308231895605520
15 2222306773263886624
16 75615701295449074084
17 2647156154616207962920
18 95215874465318554556776
19 3514739264129342710455184
20 133012394550946993742673304
21 5156112210399927390763631056
22 204570581814658024128260509360

List of values

[1, 4, 40, 580, 10312, 209752, 4707952, 114128308, 2946787192, 80268150808, 2290811949904, 68149759850680, 2105074730357968, 67308231895605520, 2222306773263886624, 75615701295449074084, 2647156154616207962920, 95215874465318554556776, 3514739264129342710455184, 133012394550946993742673304, 5156112210399927390763631056, 204570581814658024128260509360]

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

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