Question 1013654
Couple of ways to do that...here's one way...
The sum of the first 300 integers:  1,2,3,4,5,... is found by
S = n(n+1)/2 = 300*301/2 = 45150
but since our sequence is four times that, that is, ours goes by 4,8,12,16,...,
we will merely multiply our answer by four and get
S = 4*45150 = 180600