lateral thinking - A sequence named by a children's toy

Here's a part of the sequence:

(A)
(B)

(C)
(D)
(E)
1113122113
311311222113
...

The letters are the missing members (there are 5 missing members) and A is the first member of the sequence. The last member presented is not the end of the sequence, it can go on forever.

The sequence begins with a single integer. Can you tell which one? Simplest solution takes the cake.

Answer

3

13

1113

3113

132113

1113122113

311311222113

Bonus points:

The next in the series:

13211321322113

Unless I made a typo, I'm fairly certain this is all correct. It's the look and say sequence, where the next number describes the last;

1

11 (there's 1 1)

21 (there's 2 1s)

1211 (there's 1 2 and 1 1s)

So in other words, 3 is the first integer.