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A007447 formatted as a simple table:

n a(n)
1 2
2 -1
3 3
4 -12
5 59
6 -354
7 2535
8 -21190
9 202731
10 -2183462
11 26130441
12 -343956264
13 4938891841
14 -76827253854
15 1287026203647
16 -23100628140676
17 442271719973507
18 -8996704216880580
19 193776558133638811

[2,-1,3,-12,59,-354,2535,-21190,202731,-2183462,
 26130441,-343956264,4938891841,-76827253854,
 1287026203647,-23100628140676,442271719973507,
 -8996704216880580,193776558133638811]

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Last modified December 4 08:07 EST 2009. Contains 170310 sequences.


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