A159319 - OEIS

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A159319 as a simple table

n	a(n)
0	1
1	3
2	126
3	66708
4	379033074
5	21399656315607
6	11566324342205917416
7	58678275719834357303044728
8	2762222169999029718435709903699050
9	1197781369953334546750963984948238943438411

[1,3,126,66708,379033074,21399656315607, 11566324342205917416,58678275719834357303044728, 2762222169999029718435709903699050, 1197781369953334546750963984948238943438411]