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A191970 as a simple table

n a(n)
0 1
1 2
2 2
3 6
4 12
5 33
6 93
7 287
8 940
9 3309
10 12183
11 47133
12 190061
13 796405
14 3456405
15 15501183
16 71681170
17 341209173
18 1669411182
19 8384579797
20 43180474608
21 227797465130
22 1229915324579
23 6790642656907
24 38311482445514
25 220712337683628
26 1297542216770482
27 7779452884747298

[1,2,2,6,12,33,93,287,940,3309,12183,47133,190061,
 796405,3456405,15501183,71681170,341209173,
 1669411182,8384579797,43180474608,227797465130,
 1229915324579,6790642656907,38311482445514,
 220712337683628,1297542216770482,7779452884747298]

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Last modified February 24 09:21 EST 2020. Contains 332209 sequences. (Running on oeis4.)