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A056662
as a simple table
n
a(n)
1
0
2
1
3
2
4
16
5
139
6
989
7
1886
8
3529
9
5995
10
13819
11
21872
12
26044
13
87719
14
232598
[0,1,2,16,139,989,1886,3529,5995,13819,21872, 26044,87719,232598]