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A007747 as a simple table

n a(n)
0 1
1 2
2 5
3 16
4 59
5 247
6 1111
7 5302
8 26376
9 135670
10 716542
11 3868142
12 21265884
13 118741369
14 671906876
15 3846342253
16 22243294360
17 129793088770
18 763444949789
19 4522896682789
20 26968749517543
21 161750625450884

[1,2,5,16,59,247,1111,5302,26376,135670,716542,
 3868142,21265884,118741369,671906876,3846342253,
 22243294360,129793088770,763444949789,
 4522896682789,26968749517543,161750625450884]

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Last modified November 12 17:06 EST 2019. Contains 329058 sequences. (Running on oeis4.)