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A002422 formatted as a simple table:

n a(n)
0 1
1 -10
2 30
3 -20
4 -10
5 -12
6 -20
7 -40
8 -90
9 -220
10 -572
11 -1560
12 -4420
13 -12920
14 -38760
15 -118864
16 -371450
17 -1179900
18 -3801900
19 -12406200
20 -40940460
21 -136468200
22 -459029400
23 -1556708400
24 -5318753700
25 -18296512728
26 -63334082520

[1,-10,30,-20,-10,-12,-20,-40,-90,-220,-572,-1560,
 -4420,-12920,-38760,-118864,-371450,-1179900,
 -3801900,-12406200,-40940460,-136468200,
 -459029400,-1556708400,-5318753700,-18296512728,
 -63334082520]

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.


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