A sequence is basically all the frames of your animation named in a serie: Draw001, Draw002, and so on… You could have saved your drawings as a sequence from Illustrator. And there are tools to rename your files.
Now you can test it exporting an AI sequence from Flash, and it will load (as EPS) in AE. Or you could export it in the PNG format, a raster format, as I sometimes do.
Bye.