A013064 - OEIS

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A013064 as a simple table

n	a(n)
0	2
1	15
2	713
3	82481
4	17926289
5	6251997081
6	3199183099305
7	2256926363091921
8	2099642392012962209
9	2490468291041882743721
10	3668423635534285779378041
11	6569558349739213693016437665

[2,15,713,82481,17926289,6251997081,3199183099305, 2256926363091921,2099642392012962209, 2490468291041882743721,3668423635534285779378041, 6569558349739213693016437665]