The Chosen One

_"You know Walter, sometimes it doesn't hurt to have someone watching your back"_ The Hitmen twins of the Juarez Cartel, Leonel and Marco Salamanca, often known as the "Cousins", have set off from Mexico in search of Walter White. They come across an informant, who only agrees to help them if they solve his puzzle of interesting numbers. There are $N$ interesting numbers $A$$1$$,$ $A$$2$$,$ $...