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A148389 as a simple table

n a(n)
0 1
1 1
2 2
3 5
4 16
5 51
6 175
7 603
8 2179
9 7966
10 30115
11 115175
12 447599
13 1754566
14 6960211
15 27838776
16 112401002
17 457156790
18 1872092533
19 7709515518
20 31925277406
21 132858964434
22 555535209096
23 2332992606313
24 9836786434533
25 41626228814418
26 176751460040269
27 752917025247036
28 3216949479854651

[1,1,2,5,16,51,175,603,2179,7966,30115,115175,
 447599,1754566,6960211,27838776,112401002,
 457156790,1872092533,7709515518,31925277406,
 132858964434,555535209096,2332992606313,
 9836786434533,41626228814418,176751460040269,
 752917025247036,3216949479854651]

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Last modified July 20 20:50 EDT 2024. Contains 374459 sequences. (Running on oeis4.)