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A220898 as a simple table

n a(n)
0 2
1 1
2 1
3 3
4 9
5 32
6 122
7 494
8 2088
9 9130
10 41018
11 188420
12 881718
13 4191343
14 20194345
15 98442879
16 484826387
17 2409437854
18 12070883798
19 60910296202
20 309356790766
21 1580443960788
22 8117428327384
23 41896435989770
24 217209722907220
25 1130759644970931
26 5908990116854607
27 30987487474146447
28 163034985804927311

[2,1,1,3,9,32,122,494,2088,9130,41018,188420,
 881718,4191343,20194345,98442879,484826387,
 2409437854,12070883798,60910296202,309356790766,
 1580443960788,8117428327384,41896435989770,
 217209722907220,1130759644970931,5908990116854607,
 30987487474146447,163034985804927311]

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Last modified April 19 08:45 EDT 2024. Contains 371782 sequences. (Running on oeis4.)