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A318102 as a simple table

na(n)
15
238
3199
41466
512365
6109700
71003929
89404402
989690920
10867506788
118486154214
1283790178300
13833805753167
148352569222312
1584150924820499
16852039732062530
178664839058268872
1888459350543053228
19906208005777385526
209312350891307447116
2195963703215086597466
22991421114632619679480

[5,38,199,1466,12365,109700,1003929,9404402,
 89690920,867506788,8486154214,83790178300,
 833805753167,8352569222312,84150924820499,
 852039732062530,8664839058268872,
 88459350543053228,906208005777385526,
 9312350891307447116,95963703215086597466,
 991421114632619679480]