All possible pair-wsie combinations

["sierra.howry" <sierra.howry@sbcglobal.net>]

Users:

 

I have

a_seq(1:5)

b_seq(1:5)

 

What is an easy method of finding the twenty five number combinations and allocating to a (25,2) vector where column 1 is a values and column 2 is the b values.  I need these index values to pull values from a 5X5 matrix.