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A331699 as a simple table

na(n)
12
26
314
430
560
6118
7236
8460
9914
101810
113608
127158
1314310
1428504
1556978
16113778
17227484
18454534
19909050
201817232
213634344
227267198
2314534120
2429064982
2558129922
26116253394
27232506236
28465000468
29929999880
301859974762
313719949488
327439848936
3314879695742

[2,6,14,30,60,118,236,460,914,1810,3608,7158,
 14310,28504,56978,113778,227484,454534,909050,
 1817232,3634344,7267198,14534120,29064982,
 58129922,116253394,232506236,465000468,929999880,
 1859974762,3719949488,7439848936,14879695742]