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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.

A369403 Expansion of (1/x) * Series_Reversion( x / (1+x)^3 * (1-x^3)^3 ).

Table of values

n a(n)
0 1
1 3
2 12
3 58
4 318
5 1887
6 11775
7 76041
8 503607
9 3401326
10 23337339
11 162214074
12 1139835938
13 8083530360
14 57783277608
15 415904602938
16 3011669994078
17 21924967877547
18 160374157346266
19 1178091991206162
20 8687419007293458
21 64285383562018856
22 477208235856114384

List of values

[1, 3, 12, 58, 318, 1887, 11775, 76041, 503607, 3401326, 23337339, 162214074, 1139835938, 8083530360, 57783277608, 415904602938, 3011669994078, 21924967877547, 160374157346266, 1178091991206162, 8687419007293458, 64285383562018856, 477208235856114384]

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

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