MathDB

3

Part of 2003 Turkey Junior National Olympiad

Problems(1)

Turkey Junior Olympiad 2003, Part II - P3

Source:

1/20/2013
How many subsets of {1,2,3,4,5,6,7,8,9,10,11}\{1,2,3,4,5,6,7,8,9,10,11\} contain no two consequtive numbers?