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A020729 as a simple table

na(n)
02
110
250
3250
41250
56250
631250
7156250
8781250
93906250
1019531250
1197656250
12488281250
132441406250
1412207031250
1561035156250
16305175781250
171525878906250
187629394531250
1938146972656250
20190734863281250
21953674316406250
224768371582031250
2323841857910156250

[2,10,50,250,1250,6250,31250,156250,781250,
 3906250,19531250,97656250,488281250,2441406250,
 12207031250,61035156250,305175781250,
 1525878906250,7629394531250,38146972656250,
 190734863281250,953674316406250,4768371582031250,
 23841857910156250]