A219624 - OEIS

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A219624 as a simple table

n	a(n)
1	15
2	103
3	2109
4	37215
5	556742
6	7236952
7	83758183
8	883579212
9	8637866670
10	79017000203
11	680721174922
12	5551569615118
13	43056987118325
14	318862834502451
15	2262765945986326
16	15435041511939113
17	101484650447289635

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