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A028414 as a simple table

na(n)
11
23
37
4111
5343
6757
710101
815751
930103
101001001
111255521
121403041
131837381
143372733
153521253
163847483
17100010001
18141979141
1910000100001
2014181118141
2116112621161
2235297579253
2335475157453
2437011411073
2538735553783
261000001000001
271020505050201

[1,3,7,111,343,757,10101,15751,30103,1001001,
 1255521,1403041,1837381,3372733,3521253,3847483,
 100010001,141979141,10000100001,14181118141,
 16112621161,35297579253,35475157453,37011411073,
 38735553783,1000001000001,1020505050201]