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A207387 as a simple table

na(n)
12
216
398
4643
55348
642167
7335915
82975974
927237128
10254712604
112518233755
1225906520150
13274611244775
143028044205471
1534585700854386

[2,16,98,643,5348,42167,335915,2975974,27237128,
 254712604,2518233755,25906520150,274611244775,
 3028044205471,34585700854386]