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A008731 as a simple table

na(n)
01
10
22
31
43
52
65
73
87
95
109
117
1212
139
1415
1512
1618
1715
1822
1918
2026
2122
2230
2326
2435
2530
2640
2735
2845
2940
3051
3145
3257
3351
3463
3557
3670
3763
3877
3970
4084
4177
4292
4384
44100
4592
46108
47100
48117
49108
50126
51117
52135
53126
54145
55135
56155
57145
58165
59155
60176
61165
62187

[1,0,2,1,3,2,5,3,7,5,9,7,12,9,15,12,18,15,22,18,
 26,22,30,26,35,30,40,35,45,40,51,45,57,51,63,57,
 70,63,77,70,84,77,92,84,100,92,108,100,117,108,
 126,117,135,126,145,135,155,145,165,155,176,165,
 187]