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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.

A360755 Expansion of (1/2) * Sum_{k>0} (2 * x * (1 + x^k))^k.

Table of values

n a(n)
1 1
2 3
3 4
4 12
5 16
6 46
7 64
8 160
9 268
10 592
11 1024
12 2292
13 4096
14 8640
15 16544
16 33824
17 65536
18 133856
19 262144
20 529576
21 1049920
22 2108416
23 4194304
24 8417408
25 16777296
26 33607680
27 67118080
28 134334656
29 268435456
30 537140208
31 1073741824
32 2148015104
33 4295023616
34 8591048704

List of values

[1, 3, 4, 12, 16, 46, 64, 160, 268, 592, 1024, 2292, 4096, 8640, 16544, 33824, 65536, 133856, 262144, 529576, 1049920, 2108416, 4194304, 8417408, 16777296, 33607680, 67118080, 134334656, 268435456, 537140208, 1073741824, 2148015104, 4295023616, 8591048704]