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A200719 as a simple table

n a(n)
0 1
1 1
2 3
3 13
4 64
5 340
6 1903
7 11053
8 65993
9 402527
10 2497439
11 15712220
12 100001459
13 642719263
14 4165537744
15 27193644061
16 178654643151
17 1180282875483
18 7836312619243
19 52259258911091
20 349902441457427
21 2351240866736891
22 15851508780927739
23 107187240225220684
24 726784821098903319

[1,1,3,13,64,340,1903,11053,65993,402527,2497439,
 15712220,100001459,642719263,4165537744,
 27193644061,178654643151,1180282875483,
 7836312619243,52259258911091,349902441457427,
 2351240866736891,15851508780927739,
 107187240225220684,726784821098903319]

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Last modified July 4 12:18 EDT 2020. Contains 335448 sequences. (Running on oeis4.)