This is a combination between accompaniment strums #2 and #3. Miss on the "&" of 1 and beat 3.
I call this the desert island strum. If you were stranded on a desert island and only had one strum you could bring, take this one. It is one of the most common accompaniment patterns.
"using accompaniment strum #4" 
Page 3, basic 4/4 accompaniment strums 
