A014943 - OEIS

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A014943 as a simple table

n	a(n)
1	1
2	51
3	1926
4	64426
5	2017551
6	60611301
7	1769595676
8	50597720676
9	1423888736301
10	39570861392551
11	1088612609439426
12	29698842101626926
13	804559224181705051
14	21666184895568423801
15	580459729664855533176

[1,51,1926,64426,2017551,60611301,1769595676, 50597720676,1423888736301,39570861392551, 1088612609439426,29698842101626926, 804559224181705051,21666184895568423801, 580459729664855533176]