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A008465 formatted as a simple table:

n a(n)
3 1
4 12
5 120
6 1040
7 7840
8 52864
9 327936
10 1912320
11 10644480
12 57164800
13 298428416
14 1522626560
15 7622451200
16 37551144960
17 182458122240
18 875972788224
19 4161315274752
20 19583780782080
21 91393766195200

[1,12,120,1040,7840,52864,327936,1912320,10644480,
 57164800,298428416,1522626560,7622451200,
 37551144960,182458122240,875972788224,
 4161315274752,19583780782080,91393766195200]

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Last modified December 3 22:15 EST 2009. Contains 170310 sequences.


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