MathDB
sequence of numbers defined by diagonal of a numbered square spiral

Source: IX - Mathematics Regional Olympiad of Mexico Northeast 2009 P1

September 17, 2022
Sequencealgebra

Problem Statement

Consider the sequence {1,3,13,31,...}\{1,3,13,31,...\} that is obtained by following diagonally the following array of numbers in a spiral. Find the number in the 100100th position of that sequence.
https://cdn.artofproblemsolving.com/attachments/b/d/3531353472a748e3e0b1497a088472691f67fd.png
Back to ProblemsView on AoPS