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A293734 as a simple table

n a(n)
0 1
1 1
2 3
3 7
4 20
5 53
6 157
7 455
8 1393
9 4270
10 13495
11 42907
12 139323
13 455182
14 1510831
15 5042858
16 17044789
17 57891598
18 198665585
19 684615958
20 2379765470
21 8302157207
22 29177909254
23 102867895209
24 364981305292
25 1298526198294
26 4645569147108
27 16659856695779
28 60036951331540

[1,1,3,7,20,53,157,455,1393,4270,13495,42907,
 139323,455182,1510831,5042858,17044789,57891598,
 198665585,684615958,2379765470,8302157207,
 29177909254,102867895209,364981305292,
 1298526198294,4645569147108,16659856695779,
 60036951331540]

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Last modified May 24 06:53 EDT 2019. Contains 323529 sequences. (Running on oeis4.)