Problem 42841. Return the sequence element III
This problem is related to Problem 42832.
Given positive integers x1, x2 and n, return a positive integer, y, which is the nth term in the Ulam sequence beginning with [x1 x2].
An Ulam sequence is an increasing sequence of positive integers, beginning with two arbitrary integers, x1 and x2. Every subsequent element is the smallest integer that can be expressed uniquely by the sum of any two distinct preceding elements. In other words, integers that can be expressed as sums of two distinct preceding elements in more than one way are excluded.
Assume n > 2.
Example:
x1 = 1
x2 = 2
n = 5
y = 6
Solution Stats
Problem Comments
-
1 Comment
This problem deserves to be is some of the groups :)
Solution Comments
Show commentsProblem Recent Solvers19
Suggested Problems
-
16579 Solvers
-
Check to see if a Sudoku Puzzle is Solved
315 Solvers
-
String substitution, sub problem to cryptoMath
225 Solvers
-
Calculate the Hamming distance between two strings
309 Solvers
-
591 Solvers
More from this Author45
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!