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A137549 as a simple table

na(n)
01
11
22
35
414
543
6143
7511
81950
97903
1033848
11152529
12720466
133555715
1418285538
1597752779
16542107657
173112916651
1818477588573
19113203102619
20714836382820
214646688247467
2231057662848411
23213217403924667
241502038027665181

[1,1,2,5,14,43,143,511,1950,7903,33848,152529,
 720466,3555715,18285538,97752779,542107657,
 3112916651,18477588573,113203102619,714836382820,
 4646688247467,31057662848411,213217403924667,
 1502038027665181]