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A342537 as a simple table

na(n)
11
21
32
45
512
635
7108
8368
91283
104639
1117003
1263222
13236819
14893515
153387953
1612904855
1749335965
18189243115

[1,1,2,5,12,35,108,368,1283,4639,17003,63222,
 236819,893515,3387953,12904855,49335965,189243115]