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A148439 as a simple table

na(n)
01
11
22
36
415
543
6143
7447
81457
95153
1017712
1162226
12228307
13826403
143045356
1511463886
1642915761
17163162575
18626421084
192403106726
209332107293
2136397643689
22142264226087
23560927157537
242216454163673
258789867068979
2635060453041676
27140072687401512
28561842105897395
292261924959908545

[1,1,2,6,15,43,143,447,1457,5153,17712,62226,
 228307,826403,3045356,11463886,42915761,163162575,
 626421084,2403106726,9332107293,36397643689,
 142264226087,560927157537,2216454163673,
 8789867068979,35060453041676,140072687401512,
 561842105897395,2261924959908545]