perplexus.info :: Numbers : Alternating Sum of Squares Crossed Triangular Number Puzzle

Alternating Sum of Squares Crossed Triangular Number Puzzle (Posted on 2023-06-24)

Is the expression given by:
n² - (n-1)²+(n-2)²+.....+ (-1)^n-2*2²+(-1)^n-1*1²
a triangular number for every value of n?

Prove your assertion.

Submitted by K Sengupta

Rating: 5.0000 (1 votes)

Solution: (Hide)

For an explanation, refer to the solution submitted by Larry in this location.

Comments: ( You must be logged in to post comments.)

	Subject	Author	Date
	solution	Larry	2023-06-24 11:30:34

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