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A350739 as a simple table

na(n)
12
21
34
414
547
6178
7697
82746
911071
1045093
11185341
12767786
133201291
1413420045
1556524684

[2,1,4,14,47,178,697,2746,11071,45093,185341,
 767786,3201291,13420045,56524684]