Problem 60306. Add non-triangular numbers
The nth triangular number is the sum of the first n positive integers. The sequence of triangular numbers starts 1, 3, 6, 10, 15, and 21. These numbers are involved in Cody Problems 5, 291, 44289, 44334, 44732, 55680, 55695, 55705, 55710, and 55715, for example.
Write a function to return the sum of the non-triangular numbers between the nth and (n+1)st triangular numbers. For example, if n = 3, then the function should return 7+8+9 = 24. Beware the banned functions.
Solution Stats
Solution Comments
Show commentsProblem Recent Solvers9
Suggested Problems
-
Find state names that start with the letter N
1211 Solvers
-
Back to basics 9 - Indexed References
439 Solvers
-
Height of a right-angled triangle
1766 Solvers
-
649 Solvers
-
832 Solvers
More from this Author271
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!