This image is a series of number in sequence created by computer app.
Facts of the image
The sequence comes from horizontal yellow line and vertical yellow line is the same number (which will appeared in the green box).
I made this by famous computer application. Not by myself :P
Hint 2: Dare to look some answers!?
C is 12.
Hint 3: Dare to look some answers!?
E is 48.
The number in green box "?" is comes from F-G sequence, A-B-C-D-E sequence.