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A053938 as a simple table

na(n)
12
26
38
458
52108
6665908
7682908
86583794
96814942
1058622892
11183475738
1279651953188
13666585663238
142081740457806
1566817996351009092
166666680833328031344

[2,6,8,58,2108,665908,682908,6583794,6814942,
 58622892,183475738,79651953188,666585663238,
 2081740457806,66817996351009092,
 6666680833328031344]