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A257886 as a simple table

na(n)
12
21
32
41
51
61
71
813
91
101
1129
121
131
1437
1529
1617
1731
1871
1971
2037
2123
221
2337
241
2541
2641
2731
2831
2959
3031
3141
3241
3341
3441
3541
3637
3741
38193
3983
4041
4153
4267
43149
4497
4559
4673
47113
48107
49137
5059
51137
5267
53101
5483
5573
56101
57241
5871
5973
6079
6183
62227
63199
64223
65127
6683
6783
68181
69227
70149
71103
721
73587
74179
75229
76167
77127
78163
79109
8083

[2,1,2,1,1,1,1,13,1,1,29,1,1,37,29,17,31,71,71,37,
 23,1,37,1,41,41,31,31,59,31,41,41,41,41,41,37,41,
 193,83,41,53,67,149,97,59,73,113,107,137,59,137,
 67,101,83,73,101,241,71,73,79,83,227,199,223,127,
 83,83,181,227,149,103,1,587,179,229,167,127,163,
 109,83]