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A102239 as a simple table

na(n)
01
17
231
3157
4781
53907
619531
797657
8488281
92441407
1012207031
1161035157
12305175781
131525878907
147629394531
1538146972657
16190734863281
17953674316407
184768371582031
1923841857910157
20119209289550781
21596046447753907

[1,7,31,157,781,3907,19531,97657,488281,2441407,
 12207031,61035157,305175781,1525878907,7629394531,
 38146972657,190734863281,953674316407,
 4768371582031,23841857910157,119209289550781,
 596046447753907]