A214160 - OEIS

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A214160 as a simple table

n	a(n)
1	1
2	18
3	902
4	60320
5	4242606
6	300785428
7	21350933122
8	1515863103360
9	107625695720486
10	7641417965382188
11	542540604803692842
12	38520382162939430200
13	2734947125009349378766
14	194181245781510954496548

[1,18,902,60320,4242606,300785428,21350933122, 1515863103360,107625695720486,7641417965382188, 542540604803692842,38520382162939430200, 2734947125009349378766,194181245781510954496548]