missing numbers

1, 2, 3, 8, 18, 28, 38, 88, 188, 288, 388, 888, 1888, 2888, 3888, 8888, 18888, 28888, 38888, 88888

What a romantic sequence!

very easy

Why not 1, 2, 3, 8, 18, 28, 38, 88, 1888, 2888, 3888 and 8888 directly ?!

Where is the 188, 288, 388, 888 coming from ?

C and D

What's romantic about the sequence?

ROMAN-tic (it was an attempt to be clever)

Hmm, the way I understood it was that you have a series of 4, and then you add to the last number of the series all the previous ones.
So the first one being : 1, 2, 3, 8, the second will have to be 18, 28, 38, 88.
Very good so far, and following the same logic, you move from the second series and proceed normally so it should go like : 1888, 2888, 3888 and 8888. You just add to 18, 28, 38, 88 the last number which is 88 !
So whats the deal with C and D
I mean just so I can understand future riddles at least..

C is roman for 100
D is roman for 500

Aha, thx markr !