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A304693 as a simple table

na(n)
12
245
3178
4918
54910
624408
7124399
8641663
93271834
1016747810
1185795064
12438971334
132247194765
1411504929439
1558893248470
16301494626010
171543466274885
187901476939284
1940450502258451
20207080879283742
211060121076327341

[2,45,178,918,4910,24408,124399,641663,3271834,
 16747810,85795064,438971334,2247194765,
 11504929439,58893248470,301494626010,
 1543466274885,7901476939284,40450502258451,
 207080879283742,1060121076327341]