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A000172 as a simple table

n a(n)
0 1
1 2
2 10
3 56
4 346
5 2252
6 15184
7 104960
8 739162
9 5280932
10 38165260
11 278415920
12 2046924400
13 15148345760
14 112738423360
15 843126957056
16 6332299624282
17 47737325577620
18 361077477684436
19 2739270870994736
20 20836827035351596

[1,2,10,56,346,2252,15184,104960,739162,5280932,
 38165260,278415920,2046924400,15148345760,
 112738423360,843126957056,6332299624282,
 47737325577620,361077477684436,2739270870994736,
 20836827035351596]

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Last modified April 21 02:10 EDT 2021. Contains 343143 sequences. (Running on oeis4.)