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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.

A302100 G.f. A(x) satisfies: A(x) = Sum_{n>=0} x^n * A(x)^n * Product_{k=0..n-1} (3*k + 1).

Table of values

n a(n)
0 1
1 1
2 5
3 41
4 449
5 6081
6 98133
7 1846377
8 39888353
9 977117825
10 26839621829
11 818332799593
12 27443807417569
13 1004188344449473
14 39809506543659477
15 1699473112658002089
16 77716022374143303489
17 3789578550994707778305
18 196255782523222432943109
19 10756748528551996006448553
20 622036345094017435642828161
21 37846075344692579622469742529

List of values

[1, 1, 5, 41, 449, 6081, 98133, 1846377, 39888353, 977117825, 26839621829, 818332799593, 27443807417569, 1004188344449473, 39809506543659477, 1699473112658002089, 77716022374143303489, 3789578550994707778305, 196255782523222432943109, 10756748528551996006448553, 622036345094017435642828161, 37846075344692579622469742529]

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

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