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A075796 as a simple table

na(n)
12
238
3682
412238
5219602
63940598
770711162
81268860318
922768774562
10408569081798
117331474697802
12131557975478638
132360712083917682
1442361259535039638
15760141959546795802
1613640194012307284798
17244763350261984330562
184392100110703410665318
1978813038642399407645162

[2,38,682,12238,219602,3940598,70711162,
 1268860318,22768774562,408569081798,7331474697802,
 131557975478638,2360712083917682,
 42361259535039638,760141959546795802,
 13640194012307284798,244763350261984330562,
 4392100110703410665318,78813038642399407645162]