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A219624 as a simple table

na(n)
115
2103
32109
437215
5556742
67236952
783758183
8883579212
98637866670
1079017000203
11680721174922
125551569615118
1343056987118325
14318862834502451
152262765945986326
1615435041511939113
17101484650447289635

[15,103,2109,37215,556742,7236952,83758183,
 883579212,8637866670,79017000203,680721174922,
 5551569615118,43056987118325,318862834502451,
 2262765945986326,15435041511939113,
 101484650447289635]