Super-Increasing Sequence Ⅹ=(X12Xx2…,xn) is super-increasing if (2, 3, 6, 13, 27, 52)is super-increasing6 Super-Increasing Sequence • X = (x1 , x2 ,…, xn ) is super-increasing if  − =  1 1 i j i j x x • (2,3,6,13,27,52 ) is super-increasing