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A129880 as a simple table

n a(n)
1 1
2 1
3 4
4 10
5 32
6 101
7 334
8 1129
9 3890
10 13618
11 48275
12 172995
13 625574
14 2279997
15 8366553
16 30885640
17 114620926
18 427383918
19 1600323161
20 6015226752
21 22687991095
22 85843131701
23 325734335544
24 1239274254094
25 4726359853214
26 18065978123065

[1,1,4,10,32,101,334,1129,3890,13618,48275,172995,
 625574,2279997,8366553,30885640,114620926,
 427383918,1600323161,6015226752,22687991095,
 85843131701,325734335544,1239274254094,
 4726359853214,18065978123065]

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Last modified June 13 17:44 EDT 2021. Contains 345008 sequences. (Running on oeis4.)