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A219912 as a simple table

na(n)
115
215
3147
4758
53800
617007
776385
8349806
91607125
107199979
1130981013
12127687103
13506185639
141941810446
157244804147
1626372456342
1793824668945
18326547924276
191112721925642
203715396008519
2112167245853141
2239113514133345

[15,15,147,758,3800,17007,76385,349806,1607125,
 7199979,30981013,127687103,506185639,1941810446,
 7244804147,26372456342,93824668945,326547924276,
 1112721925642,3715396008519,12167245853141,
 39113514133345]