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A331938 as a simple table

na(n)
01
12
24
310
428
583
6227
7626
81644
94290
1011322
1128965
1274469
13189436
14471910
151166247
162884920
177130085
1817349489
1942180190
20101820577
21242907065
22579402163
231375056009
243262651085
257768448187
2618411720785

[1,2,4,10,28,83,227,626,1644,4290,11322,28965,
 74469,189436,471910,1166247,2884920,7130085,
 17349489,42180190,101820577,242907065,579402163,
 1375056009,3262651085,7768448187,18411720785]