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A010120 as a simple table

na(n)
01
12
23
33
43
521
621
775
875
9151
10151
111365
121365
135461
145461
1514563
1614563
1787381
1887381
19184111
20184111
21932067
22932067
235592405
245592405
2513256071
2613256071
2726512143
2826512143
29357913941
30357913941
311431655765
321431655765
333817748707

[1,2,3,3,3,21,21,75,75,151,151,1365,1365,5461,
 5461,14563,14563,87381,87381,184111,184111,932067,
 932067,5592405,5592405,13256071,13256071,26512143,
 26512143,357913941,357913941,1431655765,
 1431655765,3817748707]