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A055421 as a simple table

n a(n)
0 1
1 7
2 35
3 163
4 688
5 2673
6 9763
7 33792
8 111155
9 349122
10 1053323
11 3070003
12 8681103
13 23885604
14 64075075
15 167836570
16 429817326
17 1077457554
18 2646942189
19 6379963205
20 15104418023
21 35160248084
22 80550746390
23 181768697529

[1,7,35,163,688,2673,9763,33792,111155,349122,
 1053323,3070003,8681103,23885604,64075075,
 167836570,429817326,1077457554,2646942189,
 6379963205,15104418023,35160248084,80550746390,
 181768697529]

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Last modified April 23 05:42 EDT 2021. Contains 343199 sequences. (Running on oeis4.)