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A106980 as a simple table

na(n)
12
211
347
489
5113
6251
7293
8311
9443
10599
11653
12659
13677
14809
15911
161013
171091
181163
191181
201187
211361
221409
231607
241871
251877
262243
272351
282357
292477
302549
312579
322711
332741
342969
353089
363221
373251
383323
393461
403581
413671
424013
434019

[2,11,47,89,113,251,293,311,443,599,653,659,677,
 809,911,1013,1091,1163,1181,1187,1361,1409,1607,
 1871,1877,2243,2351,2357,2477,2549,2579,2711,2741,
 2969,3089,3221,3251,3323,3461,3581,3671,4013,4019]