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A171803 as a simple table

n a(n)
0 1
1 2
2 9
3 48
4 286
5 1818
6 12086
7 82992
8 584079
9 4190738
10 30539814
11 225426240
12 1681904909
13 12663614266
14 96099303213
15 734250983952
16 5643749482600
17 43610375803722
18 338578974873523
19 2639771240159904
20 20659895819582337

[1,2,9,48,286,1818,12086,82992,584079,4190738,
 30539814,225426240,1681904909,12663614266,
 96099303213,734250983952,5643749482600,
 43610375803722,338578974873523,2639771240159904,
 20659895819582337]

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Last modified August 15 13:11 EDT 2020. Contains 336504 sequences. (Running on oeis4.)