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A340627 as a simple table

na(n)
03
18
214
330
458
5118
6234
7470
8938
91878
103754
117510
1215018
1330038
1460074
15120150
16240298
17480598
18961194
191922390
203844778
217689558
2215379114
2330758230
2461516458
25123032918
26246065834
27492131670
28984263338
291968526678
303937053354
317874106710
3215748213418
3331496426838

[3,8,14,30,58,118,234,470,938,1878,3754,7510,
 15018,30038,60074,120150,240298,480598,961194,
 1922390,3844778,7689558,15379114,30758230,
 61516458,123032918,246065834,492131670,984263338,
 1968526678,3937053354,7874106710,15748213418,
 31496426838]