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A049401 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 10
5 26
6 75
7 225
8 715
9 2347
10 7990
11 27908
12 99991
13 365587
14 1362310
15 5159208
16 19831101
17 77233517
18 304423574
19 1212962072
20 4881181036
21 19821471956
22 81165639197
23 334925706659
24 1391935877463
25 5823186349671
26 24511802558326
27 103772782048252
28 441696903185704

[1,1,2,4,10,26,75,225,715,2347,7990,27908,99991,
 365587,1362310,5159208,19831101,77233517,
 304423574,1212962072,4881181036,19821471956,
 81165639197,334925706659,1391935877463,
 5823186349671,24511802558326,103772782048252,
 441696903185704]

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Last modified October 24 01:20 EDT 2018. Contains 316541 sequences. (Running on oeis4.)