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A178901 as a simple table

n a(n)
1 2
2 4
3 6
4 12
5 20
6 36
7 70
8 136
9 270
10 540
11 1078
12 2148
13 4290
14 8568
15 17130
16 34256
17 68510
18 137016
19 274018
20 548020
21 1096032
22 2192058
23 4384099
24 8768184
25 17536350
26 35072700
27 70145379
28 140290752
29 280581496
30 561162990
31 1122325953
32 2244651904

[2,4,6,12,20,36,70,136,270,540,1078,2148,4290,
 8568,17130,34256,68510,137016,274018,548020,
 1096032,2192058,4384099,8768184,17536350,35072700,
 70145379,140290752,280581496,561162990,1122325953,
 2244651904]

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Last modified May 12 19:25 EDT 2024. Contains 372494 sequences. (Running on oeis4.)