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A019009 as a simple table

n a(n)
2 3
3 15
4 35
5 220
6 1061
7 5229
8 27996
9 169400
10 1119573
11 7630797
12 52087939
13 353765130
14 2394603278
15 16234023660
16 110662223373

[3,15,35,220,1061,5229,27996,169400,1119573,
 7630797,52087939,353765130,2394603278,16234023660,
 110662223373]

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Last modified August 7 14:43 EDT 2020. Contains 336276 sequences. (Running on oeis4.)