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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.

A274379 G.f. satisfies A(x) = (1 + x*A(x))^3 * (1 + x^2*A(x)^3).

Table of values

n a(n)
0 1
1 3
2 13
3 70
4 429
5 2842
6 19794
7 142758
8 1056655
9 7980280
10 61251261
11 476387379
12 3746317414
13 29738316330
14 237968639936
15 1917578268288
16 15546796822656
17 126728260011920
18 1037987924978125
19 8538459191677170
20 70509828893263474
21 584310452973463242
22 4857624566855734836
23 40501472981905806550
24 338594135314564168494
25 2837641019938074131463
26 23835438376045780734390
27 200633658871150345742269
28 1692132786239339256115050
29 14297391426538004065333910
30 121009206594941545408186768

List of values

[1, 3, 13, 70, 429, 2842, 19794, 142758, 1056655, 7980280, 61251261, 476387379, 3746317414, 29738316330, 237968639936, 1917578268288, 15546796822656, 126728260011920, 1037987924978125, 8538459191677170, 70509828893263474, 584310452973463242, 4857624566855734836, 40501472981905806550, 338594135314564168494, 2837641019938074131463, 23835438376045780734390, 200633658871150345742269, 1692132786239339256115050, 14297391426538004065333910, 121009206594941545408186768]

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