The first test case is wrong 0 and 21 are triangular numbers too (https://oeis.org/A000217), therefore:
[ 0, 6;
PS: And 0 does not make a pair with every number in this case.
What's wrong with the case x=20 in test suite? Why is y_correct=[ 10 10] ? I cannot pass it.
I don't know why your cheat isn't working, but look closely at what numbers your "for n=1:N" loop generates for that case.
Return the Fibonacci Sequence
Implement simple rotation cypher
Set some matrix elements to zero
Square Digits Number Chain Terminal Value (Inspired by Project Euler Problem 92)
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If you prick us, do we not bleed?
Should Mr McNugget even get out of bed today?
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