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A156538 as a simple table

na(n)
12
22
32
42
5-10
62
72
8-31
9-31
102
112
12989
13-406
14989
152
162
1781578
18-16213
19-16213
2081578
212
222
23-19816168
243777869
25670556
263777869
27-19816168
282
292
30-14445938413
312685823244
32251846999
33251846999
342685823244
35-14445938413
362

[2,2,2,2,-10,2,2,-31,-31,2,2,989,-406,989,2,2,
 81578,-16213,-16213,81578,2,2,-19816168,3777869,
 670556,3777869,-19816168,2,2,-14445938413,
 2685823244,251846999,251846999,2685823244,
 -14445938413,2]