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A276649 as a simple table

na(n)
12
27
347
4191
5383
6439
71151
81399
92351
102879
113119
123511
133559
144127
155087
165431
176911
188887
199127
209791
219887
2212391
2313151
2414407
2515551
2616607
2719543
2820399
2921031
3021319
3121839
3223039
3325391
3426399
3528087
3628463
3728711
3829287
3933223
4039551
4143103
4244879

[2,7,47,191,383,439,1151,1399,2351,2879,3119,3511,
 3559,4127,5087,5431,6911,8887,9127,9791,9887,
 12391,13151,14407,15551,16607,19543,20399,21031,
 21319,21839,23039,25391,26399,28087,28463,28711,
 29287,33223,39551,43103,44879]