A250947 - OEIS

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A250947 as a simple table

n	a(n)
1	4213
2	37477
3	289407
4	2067987
5	13550488
6	82716842
7	475951361
8	2607327593
9	13706603051
10	69579650721
11	342789966169
12	1645599770557
13	7723376454256
14	35535740771330
15	160654007541185
16	715028979049233
17	3138157060272099

[4213,37477,289407,2067987,13550488,82716842, 475951361,2607327593,13706603051,69579650721, 342789966169,1645599770557,7723376454256, 35535740771330,160654007541185,715028979049233, 3138157060272099]