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A147904
as a simple table
n
a(n)
1
1
2
2
3
6
4
16
5
54
6
232
7
1194
8
5348
9
28874
10
153508
11
860486
12
4887496
13
36291722
14
265127656
15
2037271658
16
15840444682
[1,2,6,16,54,232,1194,5348,28874,153508,860486, 4887496,36291722,265127656,2037271658,15840444682]
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Last modified April 24 19:56 EDT 2024. Contains 371963 sequences. (Running on oeis4.)