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A223963 as a simple table

na(n)
164
2707
33471
412311
536028
692734
7217144
8471994
9965172
101874532
113482781
126225291
1310754192
1418022648
1529393806
1646779538
1772814768
18111073890
19166336539
20244910775
21355022580
22507281450
23715232788
24996008770
251371090364

[64,707,3471,12311,36028,92734,217144,471994,
 965172,1874532,3482781,6225291,10754192,18022648,
 29393806,46779538,72814768,111073890,166336539,
 244910775,355022580,507281450,715232788,996008770,
 1371090364]