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A198304 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 9
5 21
6 54
7 148
8 442
9 1433
10 5061
11 19394
12 80308
13 357241
14 1697870
15 8577240
16 45845235
17 258198133
18 1526631800
19 9445795717
20 60988643813
21 409933740177
22 2862338202947
23 20723903238290
24 155329193200741
25 1203428108558453
26 9624564394649845
27 79357873429159078

[1,1,2,4,9,21,54,148,442,1433,5061,19394,80308,
 357241,1697870,8577240,45845235,258198133,
 1526631800,9445795717,60988643813,409933740177,
 2862338202947,20723903238290,155329193200741,
 1203428108558453,9624564394649845,
 79357873429159078]

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Last modified December 6 09:18 EST 2021. Contains 349563 sequences. (Running on oeis4.)