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A081047 formatted as a simple table:

n a(n)
0 1
1 0
2 -1
3 -5
4 -26
5 -154
6 -1044
7 -8028
8 -69264
9 -663696
10 6999840
11 -80627040
12 -1007441280
13 -13575738240
14 -196287356160
15 -3031488633600
16 -49811492505600
17 -867718162483200
18 -15974614352793600
19 -309920046408806400
20 -6320046028584960000

[1,0,-1,-5,-26,-154,-1044,-8028,-69264,-663696,
 6999840,-80627040,-1007441280,-13575738240,
 -196287356160,-3031488633600,-49811492505600,
 -867718162483200,-15974614352793600,
 -309920046408806400,-6320046028584960000]

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.


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