In the infinite series 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 4, 5... each positive integer k appears k times in consecutive order.
Write a formula for the sum of the first n terms of the series.
(In reply to
A formula by Dej Mar)
Sloane A060432
The summation from 0 to k doesn't make sense.
...and "n" doesn't appear anywhere in your formula. How can you find the first n terms without specifying the value of n?
Edited on May 17, 2007, 12:45 am

Posted by Mindrod
on 20070514 21:04:52 