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A166036 as a simple table

na(n)
01
1-4
224
3-104
4584
5-2664
614344
7-67624
8354504
9-1706984
108797064
11-42936744
12218878024
13-1077612904
145455173384
15-27007431464
16136110899144
17-676259528424
183398477511304
19-16923668079784

[1,-4,24,-104,584,-2664,14344,-67624,354504,
 -1706984,8797064,-42936744,218878024,-1077612904,
 5455173384,-27007431464,136110899144,
 -676259528424,3398477511304,-16923668079784]