I would create two Arrays of pitches and instantiate two sequencers. Something like...
pitches1 add: nbr1.
pitches2 add: nbr2
seq start: 0 s length: f size pitches: pitches1 durations: durs.
seq start: 0 s length: f size pitches: pitches2 durations: durs.
That way you can have fun with playing them in parallel, or slightly offset from one another in time (or with the pitches in reverse order, etc etc)