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A057712
as a simple table
n
a(n)
1
1
2
4
3
13
4
60
5
276
6
1416
7
7201
8
37972
9
201989
10
1089815
11
5929666
12
32533673
13
179657435
[1,4,13,60,276,1416,7201,37972,201989,1089815, 5929666,32533673,179657435]
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Last modified April 17 21:22 EDT 2024. Contains 371767 sequences. (Running on oeis4.)