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A154091
as a simple table
n
a(n)
5
15444
6
106446
7
294845
8
765100
9
1132408
10
1998601
11
2586773
12
2366585
13
1788843
14
1141243
15
542455
[15444,106446,294845,765100,1132408,1998601, 2586773,2366585,1788843,1141243,542455]