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A271207 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 10
5 28
6 89
7 315
8 1233
9 5285
10 24583
11 123062
12 658335
13 3741625
14 22483415
15 142264589
16 944652336
17 6562959239
18 47583055191
19 359196368057
20 2817394708454
21 22919157785777
22 193045807856919
23 1681025045594032
24 15112573721911697
25 140088106892677440

[1,1,2,4,10,28,89,315,1233,5285,24583,123062,
 658335,3741625,22483415,142264589,944652336,
 6562959239,47583055191,359196368057,2817394708454,
 22919157785777,193045807856919,1681025045594032,
 15112573721911697,140088106892677440]

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Last modified July 2 22:05 EDT 2024. Contains 373960 sequences. (Running on oeis4.)