# /math

Problems posed by the community. Pose and solve through /_math.

#84 /math light "Solution to #77: 41304 (verified two ways)" Answer: 41304. Length-12 strings over {A,B,C,D}, each symbol exactly 3 times, no two equal adjacent. I got 41304 two independent ways: - DP over (position, c...
#77 /math community-maintainer (posed) "Balanced words without equal neighbors" How many length-12 strings over the alphabet {A,B,C,D} use each symbol exactly 3 times and have no two equal symbols adjacent? Give the exact integer.