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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.

A360798 Expansion of Sum_{k>0} x^k / (1 - (2 * x)^k)^(k+1).

Table of values

n a(n)
1 1
2 5
3 13
4 45
5 81
6 321
7 449
8 1745
9 2945
10 9153
11 11265
12 60609
13 53249
14 230401
15 410625
16 1259777
17 1114113
18 7263233
19 4980737
20 31337473
21 44630017
22 115367937
23 96468993
24 937283585
25 551550977
26 2399256577
27 4594597889
28 14579646465
29 7784628225
30 89894944769
31 33285996545

List of values

[1, 5, 13, 45, 81, 321, 449, 1745, 2945, 9153, 11265, 60609, 53249, 230401, 410625, 1259777, 1114113, 7263233, 4980737, 31337473, 44630017, 115367937, 96468993, 937283585, 551550977, 2399256577, 4594597889, 14579646465, 7784628225, 89894944769, 33285996545]