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A004113 as a simple table

n a(n)
1 1
2 2
3 6
4 18
5 60
6 204
7 734
8 2694
9 10162
10 38982
11 151920
12 599244
13 2389028
14 9608668
15 38945230
16 158904230
17 652178206
18 2690598570
19 11151718166
20 46412717826
21 193891596436
22 812748036380
23 3417407089470
24 14410094628558
25 60920843101858
26 258169745573158
27 1096494947168142

[1,2,6,18,60,204,734,2694,10162,38982,151920,
 599244,2389028,9608668,38945230,158904230,
 652178206,2690598570,11151718166,46412717826,
 193891596436,812748036380,3417407089470,
 14410094628558,60920843101858,258169745573158,
 1096494947168142]

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Last modified April 25 12:32 EDT 2024. Contains 371969 sequences. (Running on oeis4.)