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A243577 as a simple table

na(n)
139
271
387
4119
5191
6255
7287
8351
9471
10567
11615
12711
13879
141007
151071
161199
171415
181575
191655
201815
212079
222271
232367
242559
252871
263095
273207
283431
293791
304047
314175
324431
334839
345127
355271
365559
376015
386335
396495
406815
417319
427671
437847
448199
458751
469135
479327
489711

[39,71,87,119,191,255,287,351,471,567,615,711,879,
 1007,1071,1199,1415,1575,1655,1815,2079,2271,2367,
 2559,2871,3095,3207,3431,3791,4047,4175,4431,4839,
 5127,5271,5559,6015,6335,6495,6815,7319,7671,7847,
 8199,8751,9135,9327,9711]