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A176357
as a simple table
n
a(n)
1
1
2
127
3
4054
4
37210
5
134325
6
776241
7
1313848
8
5536128
9
7280823
10
28243653
11
32246894
12
74873810
[1,127,4054,37210,134325,776241,1313848,5536128, 7280823,28243653,32246894,74873810]