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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.

A360771 Expansion of Sum_{k>=0} (x * (2 + x^k))^k.

Table of values

n a(n)
0 1
1 2
2 5
3 8
4 20
5 32
6 77
7 128
8 288
9 518
10 1104
11 2048
12 4313
13 8192
14 16832
15 32848
16 66568
17 131072
18 264688
19 524288
20 1053737
21 2097824
22 4205568
23 8388608
24 16803744
25 33554442
26 67162112
27 134222336
28 268550704
29 536870912
30 1073999165
31 2147483648
32 4295493376
33 8589962752

List of values

[1, 2, 5, 8, 20, 32, 77, 128, 288, 518, 1104, 2048, 4313, 8192, 16832, 32848, 66568, 131072, 264688, 524288, 1053737, 2097824, 4205568, 8388608, 16803744, 33554442, 67162112, 134222336, 268550704, 536870912, 1073999165, 2147483648, 4295493376, 8589962752]