finally, the squares of all the address Numbers are Triangular Numbers. Triangular Numbers are produced with the formula Tx=X(X+1)/2. address Numbers satisfy the equation . Therefore, a restatement of the Address Problem is: Fine those Triangular Number which are perfect squares.
Proof of pattern G and K
the fact that pattern G and K generate more Address Numbers is proven easily. Knowing N and X are solutions (meaning they satisfy the equation ), let U = and V= and show that 2U2= by the follwing:
since 2U2= is equivalent to an equation we already know to be true, it must also be true.
The fact that patterns G and K will give all solutions (without missing any ) is a little more difficult to prove.
we will assume that patters G and K miss some solutions and show that this leads to a contradiction.
let (U,V) be the set of positive integeral solutions with the smallest value of V not in the sequence generated by pattern G and K. inserting (U,V) into equations (8) and (9), we have
in order to establish the contradictino we need to show: