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A304173 as a simple table

na(n)
11
21
32
45
513
634
790
8242
9660
101822
115085
1214333
1340759
14116817
15337140
16979098
172859439
188393113
1924747052
2073262246
21217681621
22648939319
231940461444
245818595438
2517492367097
2652712114792
27159193762250
28481754196170
291460650624068
304436422703787
3113496947320929

[1,1,2,5,13,34,90,242,660,1822,5085,14333,40759,
 116817,337140,979098,2859439,8393113,24747052,
 73262246,217681621,648939319,1940461444,
 5818595438,17492367097,52712114792,159193762250,
 481754196170,1460650624068,4436422703787,
 13496947320929]