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What's the next number in this sequence?

- [0]
- [1 0]
- [1 1 1 0]
- [3 1 1 0]
- [1 3 2 1 1 0]

This a variant on the well-known "look and say" or Morris sequence, where each new iteration is made up by 'saying' the number of numbers you see. That last line is "one 3; then two 1s; then one 0".

Create a function that returns the next element of this sequence, given a vector as a starting seed.

50 correct solutions
31 incorrect solutions

Last solution submitted on Jan 30, 2015

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