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A148174 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 12
5 27
6 84
7 224
8 712
9 2006
10 6662
11 19530
12 66075
13 200809
14 687115
15 2142561
16 7425605
17 23578903
18 82400432
19 266087903
20 936840796
21 3062357204
22 10851189800
23 35873694160
24 127705408346
25 426238811147
26 1524384589614
27 5127606562685
28 18409111458399
29 62372449364233
30 224664598203130
31 765864853776425

[1,1,2,4,12,27,84,224,712,2006,6662,19530,66075,
 200809,687115,2142561,7425605,23578903,82400432,
 266087903,936840796,3062357204,10851189800,
 35873694160,127705408346,426238811147,
 1524384589614,5127606562685,18409111458399,
 62372449364233,224664598203130,765864853776425]

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Last modified November 29 13:17 EST 2021. Contains 349416 sequences. (Running on oeis4.)