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A103943 as a simple table

n a(n)
1 1
2 3
3 12
4 48
5 196
6 798
7 3248
8 13184
9 53416
10 216018
11 872344
12 3518496
13 14177528
14 57080572
15 229657792
16 923474944
17 3711572176
18 14911097514
19 59883185096
20 240416320928
21 964947251544
22 3872021946532
23 15533828715232
24 62306843932928

[1,3,12,48,196,798,3248,13184,53416,216018,872344,
 3518496,14177528,57080572,229657792,923474944,
 3711572176,14911097514,59883185096,240416320928,
 964947251544,3872021946532,15533828715232,
 62306843932928]

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Last modified March 2 09:45 EST 2021. Contains 341746 sequences. (Running on oeis4.)