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A025165 as a simple table

na(n)
01
12
21
3-2
4-5
5-2
623
758
8-103
9-670
10257
117214
124387
13-77794
14-134825
15819466
162841841
17-7427774
18-55739071
1922221790
201081264139
211718092478
22-20988454441
23-79774943398
24402959508745

[1,2,1,-2,-5,-2,23,58,-103,-670,257,7214,4387,
 -77794,-134825,819466,2841841,-7427774,-55739071,
 22221790,1081264139,1718092478,-20988454441,
 -79774943398,402959508745]