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A193954 as a simple table

na(n)
01
12
21
35
43
51
613
79
85
92
1028
1121
1214
138
143
1558
1646
1734
1823
1913
205
21114
2294
2374
2455
2537
2621
278
28218
29185
30152
31120
3289
3360
3434
3513
36407
37353
38299
39246
40194
41144
4297
4355
4421
45747
46659
47571
48484
49398
50314
51233
52157
5389
5434
551352
561209
571066
58924
59783
60644

[1,2,1,5,3,1,13,9,5,2,28,21,14,8,3,58,46,34,23,13,
 5,114,94,74,55,37,21,8,218,185,152,120,89,60,34,
 13,407,353,299,246,194,144,97,55,21,747,659,571,
 484,398,314,233,157,89,34,1352,1209,1066,924,783,
 644]