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A032241 as a simple table

n a(n)
1 4
2 6
3 4
4 15
5 72
6 266
7 1044
8 3780
9 14056
10 51132
11 188604
12 693845
13 2572920
14 9566046
15 35758628
16 134134080
17 505159200
18 1908539864
19 7233104844
20 27486455049
21 104713295712
22 399817073946
23 1529746919604

[4,6,4,15,72,266,1044,3780,14056,51132,188604,
 693845,2572920,9566046,35758628,134134080,
 505159200,1908539864,7233104844,27486455049,
 104713295712,399817073946,1529746919604]

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Last modified April 18 06:24 EDT 2024. Contains 371769 sequences. (Running on oeis4.)