login

A298027 as a simple table

na(n)
01
17
213
331
443
573
691
7133
8157
9211
10241
11307
12343
13421
14463
15553
16601
17703
18757
19871
20931
211057
221123
231261
241333
251483
261561
271723
281807
291981
302071
312257
322353
332551
342653
352863
362971
373193
383307
393541
403661
413907
424033
434291
444423
454693
464831
475113
485257
495551
505701
516007
526163
536481

[1,7,13,31,43,73,91,133,157,211,241,307,343,421,
 463,553,601,703,757,871,931,1057,1123,1261,1333,
 1483,1561,1723,1807,1981,2071,2257,2353,2551,2653,
 2863,2971,3193,3307,3541,3661,3907,4033,4291,4423,
 4693,4831,5113,5257,5551,5701,6007,6163,6481]