A197771 - OEIS

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A197771 as a simple table

n	a(n)
1	12
2	507
3	37038
4	3834009
5	512501793
6	83914215403
7	16258109291003
8	3637416562713076
9	922786228220640102
10	261741863272493596615
11	82078032321730681299098
12	28195269239973685901676783
13	10529425953839699619063326836

[12,507,37038,3834009,512501793,83914215403, 16258109291003,3637416562713076, 922786228220640102,261741863272493596615, 82078032321730681299098, 28195269239973685901676783, 10529425953839699619063326836]