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A032123 as a simple table

n a(n)
0 1
1 1
2 4
3 10
4 38
5 126
6 472
7 1716
8 6470
9 24310
10 92504
11 352716
12 1352540
13 5200300
14 20060016
15 77558760
16 300546630
17 1166803110
18 4537591960
19 17672631900
20 68923356788
21 269128937220
22 1052049834576
23 4116715363800
24 16123803193628
25 63205303218876
26 247959271674352
27 973469712824056

[1,1,4,10,38,126,472,1716,6470,24310,92504,352716,
 1352540,5200300,20060016,77558760,300546630,
 1166803110,4537591960,17672631900,68923356788,
 269128937220,1052049834576,4116715363800,
 16123803193628,63205303218876,247959271674352,
 973469712824056]

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Last modified May 2 15:37 EDT 2024. Contains 372197 sequences. (Running on oeis4.)