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A325508 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 10
5 20
6 42
7 84
8 204
9 476
10 798
11 1596
12 3828
13 7656
14 12276
15 24180
16 36660
17 73320
18 120840
19 241680
20 389424
21 785680
22 1294440
23 2588880
24 3848880
25 7147920
26 11264760
27 15926040
28 26057304
29 52114608
30 74421648
31 148843296
32 187159392
33 340949280
34 527531760
35 926505360

[1,1,2,4,10,20,42,84,204,476,798,1596,3828,7656,
 12276,24180,36660,73320,120840,241680,389424,
 785680,1294440,2588880,3848880,7147920,11264760,
 15926040,26057304,52114608,74421648,148843296,
 187159392,340949280,527531760,926505360]

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Last modified September 20 16:30 EDT 2019. Contains 327242 sequences. (Running on oeis4.)