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A145236 as a simple table

na(n)
12
21
31
43
55
65
79
89
913
1017
1119
1223
1325
1427
1531
1635
1741
1841
1947
2051
2151
2257
2361
2465
2573
2675
2777
2881
2983
3085
3199
32101
33107
34109
35117
36119
37125
38129
39133
40139
41145
42145
43155
44157
45161
46163
47173
48183
49187
50189
51193
52199
53201
54209
55215
56221
57225
58227
59233
60237
61239
62247

[2,1,1,3,5,5,9,9,13,17,19,23,25,27,31,35,41,41,47,
 51,51,57,61,65,73,75,77,81,83,85,99,101,107,109,
 117,119,125,129,133,139,145,145,155,157,161,163,
 173,183,187,189,193,199,201,209,215,221,225,227,
 233,237,239,247]