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A049947 as a simple table

n a(n)
1 1
2 1
3 4
4 7
5 20
6 34
7 74
8 175
9 491
10 808
11 1622
12 3271
13 6683
14 13999
15 30461
16 71650
17 200951
18 330253
19 660512
20 1321051
21 2642243
22 5285119
23 10572701
24 21156130
25 42369911
26 84998425
27 170987648
28 345939364
29 707749739
30 1479341773
31 3219624485

[1,1,4,7,20,34,74,175,491,808,1622,3271,6683,
 13999,30461,71650,200951,330253,660512,1321051,
 2642243,5285119,10572701,21156130,42369911,
 84998425,170987648,345939364,707749739,1479341773,
 3219624485]

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Last modified May 27 13:56 EDT 2022. Contains 354097 sequences. (Running on oeis4.)