SOLUTION: what is the next element of the following number sequence ? 121333, 123333 & 124333

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Question 1172387: what is the next element of the following number sequence ? 121333, 123333 & 124333
Answer by Edwin McCravy(20056) About Me  (Show Source):
You can put this solution on YOUR website!
121333 
123333 
124333

Only what's between the 2 and the first 3 ever changes. The others stay the
same. I notice that 1+3=4, so maybe to get the next number to go between the 2
and the first 3 (the red number), we add the last two red numbers. If so,

121333 
123333 
124333
127333 
1211333 
1218333
etc., etc.,...

Edwin