Increasing increment values with vector operations

I'm trying to change this code into a single line of code using vector operations,

a = [];
x = 5;
while x <= 15
  a(x-4) = x^2;
  x = x + 1;
end

Where the sequence is

25,36,49,64,81,100,121,144,169,196,225

and the difference between two numbers are

11,13,15,17,19,21,23,25,27,29

The number difference have a value of 2 between them

My idea was,

a=25:X:225

where X is the increment value, but i found that X should increase by 2 after every number(11,13,15,17,...). How should i go about this?

[Jan]

By the way: a[x-4] = x^2 must be a(x-4) = x^2

[Ken Lew]

Oh right. Changed it, Thanks!

Answer 1

[Jan]

This is leaner than your loop:

a = (5:15) .^ 2

[Ken Lew]

Thank you so much ! I wasn't aware you could do this.

Answer 2

[Ameer Hamza]

difference = 11:2:29;
a = 25+[0 cumsum(difference)]

a =
  25    36    49    64    81   100   121   144   169   196   225

[Jan]

+1. Exactly.