A145123 - OEIS

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A145123 as a simple table

n	a(n)
1	1
2	301
3	90901
4	27451801
5	8290353001
6	2503659154501
7	756096774306301
8	228338722181348401
9	68957538001992910801
10	20824948137879677713501
11	6289065380101660676566501
12	1899276919842563644645369801

[1,301,90901,27451801,8290353001,2503659154501, 756096774306301,228338722181348401, 68957538001992910801,20824948137879677713501, 6289065380101660676566501, 1899276919842563644645369801]