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A081668 as a simple table

n a(n)
0 1
1 2
2 2
3 2
4 6
5 2
6 20
7 2
8 70
9 2
10 252
11 2
12 924
13 2
14 3432
15 2
16 12870
17 2
18 48620
19 2
20 184756
21 2
22 705432
23 2
24 2704156
25 2
26 10400600
27 2
28 40116600
29 2
30 155117520
31 2
32 601080390
33 2
34 2333606220
35 2
36 9075135300
37 2
38 35345263800
39 2
40 137846528820
41 2
42 538257874440
43 2

[1,2,2,2,6,2,20,2,70,2,252,2,924,2,3432,2,12870,2,
 48620,2,184756,2,705432,2,2704156,2,10400600,2,
 40116600,2,155117520,2,601080390,2,2333606220,2,
 9075135300,2,35345263800,2,137846528820,2,
 538257874440,2]

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Last modified March 28 16:58 EDT 2024. Contains 371254 sequences. (Running on oeis4.)