OMK 2010
Source: Malaysia National Olympiad 2010 Bongsu Category Problem 2
June 4, 2011
inductioncombinatorics unsolvedcombinatorics
Problem Statement
A student wrote down the following sequence of numbers : the first number is 1, the second number is 2, and after that, each number is obtained by adding together all the previous numbers. Determine the 12th number in the sequence.