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A131953 as a simple table

na(n)
01
14
22
34
45
54
610
75
87
98
1016
1111
127
1311
1416
1534
1617
1713
1811
1919
2032
2164
2235
2319
2417
2519
2635
2764
28130
2965
3037
3123
3225
3335
3467
35128
36256
37131
3867
3941
4031
4141
4267
43131
44256
45514
46257
47133
4871
4949
5047
5173
52131
53259
54512

[1,4,2,4,5,4,10,5,7,8,16,11,7,11,16,34,17,13,11,
 19,32,64,35,19,17,19,35,64,130,65,37,23,25,35,67,
 128,256,131,67,41,31,41,67,131,256,514,257,133,71,
 49,47,73,131,259,512]