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A187003 as a simple table

n a(n)
0 1
1 1
2 3
3 8
4 20
5 50
6 126
7 317
8 798
9 2008
10 5053
11 12716
12 32000
13 80528
14 202649
15 509967
16 1283334
17 3229515
18 8127087
19 20451846
20 51467150
21 129517283
22 325930746
23 820205989
24 2064051559
25 5194193770
26 13071208809
27 32893747768
28 82777244097
29 208309256477
30 524211053501

[1,1,3,8,20,50,126,317,798,2008,5053,12716,32000,
 80528,202649,509967,1283334,3229515,8127087,
 20451846,51467150,129517283,325930746,820205989,
 2064051559,5194193770,13071208809,32893747768,
 82777244097,208309256477,524211053501]

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Last modified July 30 00:51 EDT 2021. Contains 346346 sequences. (Running on oeis4.)