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A138983 as a simple table

na(n)
01
12
26
333
4241
52391
630903
7499000
89804344
9230270387
106364661087
11204142831017
127508991442137
13313657014920304
1414753881974826196
15775751424297987671
1645294591976852153687
172919681469388967044215

[1,2,6,33,241,2391,30903,499000,9804344,230270387,
 6364661087,204142831017,7508991442137,
 313657014920304,14753881974826196,
 775751424297987671,45294591976852153687,
 2919681469388967044215]