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A051648 as a simple table

na(n)
1421
2631
31051
41471
52311
62731
73571
84831
96091
109871
1111131
1212391
1314071
1415331
1517431
1618691
1721211
1828771
1929191
2032971
2134231
2237591
2338011
2440111
2540531
2646831
2748091
2852711
2956911
3058171
3159011
3265731
3366571
3472871
3573291

[421,631,1051,1471,2311,2731,3571,4831,6091,9871,
 11131,12391,14071,15331,17431,18691,21211,28771,
 29191,32971,34231,37591,38011,40111,40531,46831,
 48091,52711,56911,58171,59011,65731,66571,72871,
 73291]