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A004117 as a simple table

n a(n)
0 1
1 1
2 2
3 14
4 35
5 91
6 728
7 1976
8 5434
9 135850
10 380380
11 1071980
12 9111830
13 25933670
14 74096200
15 637227320
16 1832028545
17 5280552865
18 137294374490
19 397431084050
20 1152550143745
21 10043651252635
22 29217894553120
23 85112997176480

[1,1,2,14,35,91,728,1976,5434,135850,380380,
 1071980,9111830,25933670,74096200,637227320,
 1832028545,5280552865,137294374490,397431084050,
 1152550143745,10043651252635,29217894553120,
 85112997176480]

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Last modified February 21 16:44 EST 2018. Contains 299414 sequences. (Running on oeis4.)