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A118189 as a simple table

na(n)
00
11
2-2
319
4-764
5125701
6-83499002
7222705979399
8-2379643407695864
9101770765968904486921
10-17414214749792087566712822
1111920352399707142353576549941259
12-32640155138015817553201240150152052724
13357505372216293786145503061380504161718632461

[0,1,-2,19,-764,125701,-83499002,222705979399,
 -2379643407695864,101770765968904486921,
 -17414214749792087566712822,
 11920352399707142353576549941259,
 -32640155138015817553201240150152052724,
 357505372216293786145503061380504161718632461]