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A154925 as a simple table

na(n)
01
11
21
31
4-2
5-5
6-6
73
89
9-5
10-13
11-14
125
1330
14510
15-10
16-21
17-22
187
1959
205163
2153307975
22-14
23-29
24-30

[1,1,1,1,-2,-5,-6,3,9,-5,-13,-14,5,30,510,-10,-21,
 -22,7,59,5163,53307975,-14,-29,-30]