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A240830 as a simple table

na(n)
11
21
31
41
51
61
71
87
97
107
117
127
137
147
1513
1613
1713
1813
1913
2013
2119
2213
2319
2419
2519
2619
2725
2819
2925
3019
3125
3225
3331
3425
3531
3625
3731
3825
3931
4031
4137
4231
4337
4431
4537
4637
4737
4837
4943
5037
5143
5243
5343
5443
5543
5643
5749
5849
5949
6049
6149
6249
6349
6455
6555
6655
6755
6855
6955
7061
7155
7261
7361
7461
7561
7667
7761
7867
7961
8067
8167
8273

[1,1,1,1,1,1,1,7,7,7,7,7,7,7,13,13,13,13,13,13,19,
 13,19,19,19,19,25,19,25,19,25,25,31,25,31,25,31,
 25,31,31,37,31,37,31,37,37,37,37,43,37,43,43,43,
 43,43,43,49,49,49,49,49,49,49,55,55,55,55,55,55,
 61,55,61,61,61,61,67,61,67,61,67,67,73]