A070074 - OEIS

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A070074 as a simple table

n	a(n)
0	1
1	7
2	141
3	5305
4	313333
5	26405391
6	2986704817
7	434460962041
8	78746410575945
9	17355333316259863
10	4561636814725190101
11	1407386778722787214617
12	503024214435970044854461

[1,7,141,5305,313333,26405391,2986704817, 434460962041,78746410575945,17355333316259863, 4561636814725190101,1407386778722787214617, 503024214435970044854461]