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A152880 as a simple table

n a(n)
1 1
2 1
3 3
4 8
5 23
6 71
7 229
8 759
9 2566
10 8817
11 30717
12 108278
13 385509
14 1384262
15 5006925
16 18225400
17 66711769
18 245400354
19 906711758
20 3363516354
21 12522302087
22 46773419089
23 175232388955
24 658295899526
25 2479268126762
26 9359152696924

[1,1,3,8,23,71,229,759,2566,8817,30717,108278,
 385509,1384262,5006925,18225400,66711769,
 245400354,906711758,3363516354,12522302087,
 46773419089,175232388955,658295899526,
 2479268126762,9359152696924]

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Last modified July 31 05:31 EDT 2021. Contains 346367 sequences. (Running on oeis4.)