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A190908 as a simple table

na(n)
01
12
25
315
449
5163
6549
71875
86477
922571
1079213
11279631
12991985
133533707
1412632909
1545301795
16162890781
17587091795
182120442517
197672891151
2027811187377
21100956896179
22366983328885
231335662387699

[1,2,5,15,49,163,549,1875,6477,22571,79213,279631,
 991985,3533707,12632909,45301795,162890781,
 587091795,2120442517,7672891151,27811187377,
 100956896179,366983328885,1335662387699]