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A106398
as a simple table
n
a(n)
1
1
2
-1
3
-6
4
-19
5
-39
6
-66
7
-98
8
-129
9
-172
10
-330
11
-908
12
-2502
13
-5955
14
-12107
[1,-1,-6,-19,-39,-66,-98,-129,-172,-330,-908, -2502,-5955,-12107]