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A203415 as a simple table

n a(n)
1 1
2 3
3 30
4 1680
5 201600
6 87091200
7 1103619686400
8 275463473725440000
9 240529195987579699200000
10 1163776461866305616609280000000
11 344605941225348705438623229542400000000
12 3717059729911125118574880410324812431360000000000

[1,3,30,1680,201600,87091200,1103619686400,
 275463473725440000,240529195987579699200000,
 1163776461866305616609280000000,
 344605941225348705438623229542400000000,
 3717059729911125118574880410324812431360000000000]

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Last modified August 4 15:50 EDT 2020. Contains 336202 sequences. (Running on oeis4.)