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A109085 as a simple table

n a(n)
0 1
1 1
2 3
3 10
4 38
5 153
6 646
7 2816
8 12585
9 57343
10 265401
11 1244256
12 5896512
13 28200365
14 135935424
15 659754072
16 3221354296
17 15812501100
18 77985955410
19 386254209762
20 1920391362054
21 9580985321554
22 47951223856445
23 240680464689600

[1,1,3,10,38,153,646,2816,12585,57343,265401,
 1244256,5896512,28200365,135935424,659754072,
 3221354296,15812501100,77985955410,386254209762,
 1920391362054,9580985321554,47951223856445,
 240680464689600]

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Last modified September 29 21:59 EDT 2020. Contains 337432 sequences. (Running on oeis4.)