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A204520 as a simple table

n a(n)
1 0
2 1
3 2
4 3
5 7
6 9
7 18
8 47
9 123
10 161
11 322
12 843
13 2207
14 2889
15 5778
16 15127
17 39603
18 51841
19 103682
20 271443
21 710647
22 930249
23 1860498
24 4870847
25 12752043
26 16692641
27 33385282 

[0,1,2,3,7,9,18,47,123,161,322,843,2207,2889,5778,
 15127,39603,51841,103682,271443,710647,930249,
 1860498,4870847,12752043,16692641,33385282]

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Last modified May 6 12:10 EDT 2024. Contains 372293 sequences. (Running on oeis4.)