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A153900 as a simple table

na(n)
01
12
22
33
45
510
618
748
897
9299
10769
112879
129061
1341454
14154622
15857522
163902066
1726137942
18144826739
191177942368
207878440446
2177715100928
22630332738835
237530329483705
2474116147914872
251073536700395590
2612799994974031763

[1,2,2,3,5,10,18,48,97,299,769,2879,9061,41454,
 154622,857522,3902066,26137942,144826739,
 1177942368,7878440446,77715100928,630332738835,
 7530329483705,74116147914872,1073536700395590,
 12799994974031763]