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A299569 as a simple table

na(n)
11
27
315
425
547
6113
7265
8621
91473
103443
118093
1219107
1345119
14106635
15251959
16595465
171407719
183328477
197871557
2018617533
2144037365
22104173407
23246445341
24583054499
251379487511
263263943687
277722913379
2818273883713
2943240415955

[1,7,15,25,47,113,265,621,1473,3443,8093,19107,
 45119,106635,251959,595465,1407719,3328477,
 7871557,18617533,44037365,104173407,246445341,
 583054499,1379487511,3263943687,7722913379,
 18273883713,43240415955]