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A275968 as a simple table

na(n)
1173
2409
3419
4421
5439
6487
7521
8557
9571
10617
11761
12887
13919
141009
151039
161117
171153
181171
191217
201327
211373
221549
231559
241571
251657
261693
271709
281721
291733
301783
311831
321861
331901
341993
351997
362053
372089
382339
392393
402521
412539
422647
432657
442677
452693
462777

[173,409,419,421,439,487,521,557,571,617,761,887,
 919,1009,1039,1117,1153,1171,1217,1327,1373,1549,
 1559,1571,1657,1693,1709,1721,1733,1783,1831,1861,
 1901,1993,1997,2053,2089,2339,2393,2521,2539,2647,
 2657,2677,2693,2777]