A good opportunity to implement a hashtable: lots of collisions without it.
A re-post of Solution 1137054, because that one doesn't appear in the list of solutions, for some reason (I'm not sure why).
Return the largest number that is adjacent to a zero
Return the 3n+1 sequence for n
Connect Four Win Checker
Check that number is whole number
Recaman Sequence - II
Narcissistic number ?
Find the path through the cell
How many monitors are connected ?
Numbers spiral diagonals (Part 2)
Pandigital number n°2 (Inspired by Project Euler 32)
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