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A007233 as a simple table

na(n)
13
231
3171
41575
58403
677206
7411771
83828187
920176803
10185374380
11988663371
129083344725
1348444505203
14445083891551
152373780754971
1622068742956375

[3,31,171,1575,8403,77206,411771,3828187,20176803,
 185374380,988663371,9083344725,48444505203,
 445083891551,2373780754971,22068742956375]