Read/Write output/input from sed to a file

seq 20 | sed '5,6 { w out.txt }' #Can't print correctly. See sample output
Can't print correctly in the command field. There is a new line before } as follows seq 20 | sed -n '5,6 { w out.txt }'
Sample Output
$ seq 20 | sed  -n '5,6 { w out.txt 
}'

$ cat out.txt
5
6

0
By: totti
2011-08-29 10:17:47

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