View Single Post
sjb-2812
sjb-2812 is offline
#4
Jun4-10, 02:36 PM
P: 418

Magic constant equation


I'm not sure that it is. Plugging 3 into your formula gives 10, to say nothing of what happens if n is even.

What is the sum of 1 + 2 + 3 + ... a, where a is an integer?