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A025172 as a simple table

na(n)
01
11
2-7
3-23
417
5241
6329
7-1511
8-5983
91633
1057113
1199529
12-314959
13-1525679
14-216727
1513297657
1628545857
17-62587199
18-382087111
19-200889431
203037005137
217882015153
22-11569015927
23-94076168231
24-84031193119
25678623127841
262113526993753

[1,1,-7,-23,17,241,329,-1511,-5983,1633,57113,
 99529,-314959,-1525679,-216727,13297657,28545857,
 -62587199,-382087111,-200889431,3037005137,
 7882015153,-11569015927,-94076168231,-84031193119,
 678623127841,2113526993753]