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A153868 as a simple table

na(n)
01
12
21
33
43
53
64
76
812
99
105
1110
1230
1345
1431
156
1615
1760
18135
19186
20121
217
2221
23105
24315
25651
26847
27523
288
2928
30168
31630
321736
333388
344184
352469

[1,2,1,3,3,3,4,6,12,9,5,10,30,45,31,6,15,60,135,
 186,121,7,21,105,315,651,847,523,8,28,168,630,
 1736,3388,4184,2469]