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A181219 as a simple table

na(n)
17
249
3230
41209
56475
634020
7179097
8944514
94978956
1026241679
11138316703
12729070278
133842881010
1420255521442
15106765644778
16562755120940
172966245831625
1815634892911279
1982410528967137
20434380653636920

[7,49,230,1209,6475,34020,179097,944514,4978956,
 26241679,138316703,729070278,3842881010,
 20255521442,106765644778,562755120940,
 2966245831625,15634892911279,82410528967137,
 434380653636920]