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A375016 as a simple table

na(n)
11
21
33
47
521
657
7171
8499
91497
104449
1113347
1239927
13119781
14359001
151077003
163230011
179690033
1829067105
1987201315
20261595047
21784785141
222354328729
237062986187
2421188878707
2563566636121
26190699668801
27572099006403
281716296301207
295148888903621
3015446664556857

[1,1,3,7,21,57,171,499,1497,4449,13347,39927,
 119781,359001,1077003,3230011,9690033,29067105,
 87201315,261595047,784785141,2354328729,
 7062986187,21188878707,63566636121,190699668801,
 572099006403,1716296301207,5148888903621,
 15446664556857]