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A003456 as a simple table

n a(n)
3 1
4 2
5 5
6 17
7 62
8 275
9 1272
10 6225
11 31075
12 158376
13 816229
14 4251412
15 22319056
16 117998524
17 627573216
18 3355499036
19 18025442261
20 97239773408
21 526560862829
22 2861189112867
23 15595669996482
24 85252072993968
25 467247847612316
26 2567091151780343

[1,2,5,17,62,275,1272,6225,31075,158376,816229,
 4251412,22319056,117998524,627573216,3355499036,
 18025442261,97239773408,526560862829,
 2861189112867,15595669996482,85252072993968,
 467247847612316,2567091151780343]

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Last modified August 26 02:19 EDT 2019. Contains 326324 sequences. (Running on oeis4.)