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A104088 as a simple table

na(n)
13
27
323
479
5241
6727
72179
86553
919681
1059029
11177131
12531383
131594301
144782961
1514348891
1643046623
17129140153
18387420479
191162261453
203486784393
2110460353199
2231381059607
2394143178807
24282429536453
25847288609423

[3,7,23,79,241,727,2179,6553,19681,59029,177131,
 531383,1594301,4782961,14348891,43046623,
 129140153,387420479,1162261453,3486784393,
 10460353199,31381059607,94143178807,282429536453,
 847288609423]