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A001867 as a simple table

n a(n)
0 1
1 3
2 6
3 11
4 24
5 51
6 130
7 315
8 834
9 2195
10 5934
11 16107
12 44368
13 122643
14 341802
15 956635
16 2690844
17 7596483
18 21524542
19 61171659
20 174342216
21 498112275
22 1426419858
23 4093181691
24 11767920118
25 33891544419
26 97764131646
27 282429537947
28 817028472960
29 2366564736723

[1,3,6,11,24,51,130,315,834,2195,5934,16107,44368,
 122643,341802,956635,2690844,7596483,21524542,
 61171659,174342216,498112275,1426419858,
 4093181691,11767920118,33891544419,97764131646,
 282429537947,817028472960,2366564736723]

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Last modified April 24 18:17 EDT 2024. Contains 371962 sequences. (Running on oeis4.)