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A063886 as a simple table

n a(n)
0 1
1 2
2 2
3 4
4 6
5 12
6 20
7 40
8 70
9 140
10 252
11 504
12 924
13 1848
14 3432
15 6864
16 12870
17 25740
18 48620
19 97240
20 184756
21 369512
22 705432
23 1410864
24 2704156
25 5408312
26 10400600
27 20801200
28 40116600
29 80233200
30 155117520
31 310235040
32 601080390
33 1202160780

[1,2,2,4,6,12,20,40,70,140,252,504,924,1848,3432,
 6864,12870,25740,48620,97240,184756,369512,705432,
 1410864,2704156,5408312,10400600,20801200,
 40116600,80233200,155117520,310235040,601080390,
 1202160780]

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Last modified April 24 04:02 EDT 2024. Contains 371918 sequences. (Running on oeis4.)