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A213446 as a simple table

na(n)
01
15
2251
319087
41070017
5134211265
6703604254357
78164168737599
88092989203533249
912600467236042756559
108136836498467582599787
11440495080723071436695083
1211816334311483623162503196771
1319935908483981827227406276943
14239295997830894998532654988331179

[1,5,251,19087,1070017,134211265,703604254357,
 8164168737599,8092989203533249,
 12600467236042756559,8136836498467582599787,
 440495080723071436695083,
 11816334311483623162503196771,
 19935908483981827227406276943,
 239295997830894998532654988331179]