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A081999 as a simple table

na(n)
01
12
27
39
429
531
671
773
8143
9149
10229
11233
12359
13361
14485
15487
16629
17631
18821
19823
201031
211033
221277
231279
241553
251559
261873
271877
282221
292237
302593
312599
322971
332999
343433
353449
363907
373911
384429
394441
404969
414973
425557
435561
446131
456133
466761
476763

[1,2,7,9,29,31,71,73,143,149,229,233,359,361,485,
 487,629,631,821,823,1031,1033,1277,1279,1553,1559,
 1873,1877,2221,2237,2593,2599,2971,2999,3433,3449,
 3907,3911,4429,4441,4969,4973,5557,5561,6131,6133,
 6761,6763]