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A053647 as a simple table

na(n)
12
25
37
413
537
673
77937
87703
9272809
10640943
115378959
12116137159
133708797237
14114649314209
15158317270283

[2,5,7,13,37,73,7937,7703,272809,640943,5378959,
 116137159,3708797237,114649314209,158317270283]