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A111642 as a simple table

na(n)
02
1-12
254
3-224
4890
5-3452
613198
7-50016
8188498
9-707916
102652678
11-9925760
1237105802
13-138631292
14517742494
15-1933118784
167216615970
17-26937891852
18100545928278
19-375272321696
201400607336218
21-5227311479036
2219509011469358
23-72809634633120
24271731700422002

[2,-12,54,-224,890,-3452,13198,-50016,188498,
 -707916,2652678,-9925760,37105802,-138631292,
 517742494,-1933118784,7216615970,-26937891852,
 100545928278,-375272321696,1400607336218,
 -5227311479036,19509011469358,-72809634633120,
 271731700422002]