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A163401 as a simple table

na(n)
1487856
2694103
3771084
4836254
51051886
61119347
71122734
81157014
91181077
101591742
111638820
121646819
131820743
141921148
151945355
162001782
172026571

[487856,694103,771084,836254,1051886,1119347,
 1122734,1157014,1181077,1591742,1638820,1646819,
 1820743,1921148,1945355,2001782,2026571]