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A186998 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 11
5 35
6 123
7 462
8 1829
9 7558
10 32380
11 143102
12 649999
13 3026171
14 14411412
15 70095713
16 347817785
17 1759198500
18 9063638685
19 47545501777
20 253854457415
21 1379172691108
22 7623064091313
23 42860238300826
24 245098499411379

[1,1,2,4,11,35,123,462,1829,7558,32380,143102,
 649999,3026171,14411412,70095713,347817785,
 1759198500,9063638685,47545501777,253854457415,
 1379172691108,7623064091313,42860238300826,
 245098499411379]

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Last modified July 28 18:22 EDT 2014. Contains 245005 sequences.