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A009670 as a simple table

n a(n)
0 1
1 -2
2 -48
3 880
4 59136
5 -4558336
6 -358510592
7 87349164032
8 5261729398784
9 -4294386293800960
10 -9972473469599744
11 442881767885962739712
12 -50940651947982996897792
13 -83250857495799899292172288

[1,-2,-48,880,59136,-4558336,-358510592,
 87349164032,5261729398784,-4294386293800960,
 -9972473469599744,442881767885962739712,
 -50940651947982996897792,
 -83250857495799899292172288]

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Last modified December 21 10:08 EST 2014. Contains 252304 sequences.