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A033850 as a simple table

na(n)
121
263
3147
4189
5441
6567
71029
81323
91701
103087
113969
125103
137203
149261
1511907
1615309
1721609
1827783
1935721
2045927
2150421
2264827
2383349
24107163
25137781
26151263
27194481
28250047
29321489
30352947
31413343
32453789
33583443
34750141
35964467

[21,63,147,189,441,567,1029,1323,1701,3087,3969,
 5103,7203,9261,11907,15309,21609,27783,35721,
 45927,50421,64827,83349,107163,137781,151263,
 194481,250047,321489,352947,413343,453789,583443,
 750141,964467]