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How many words with n digits can be formed from the alphabet \{0, 1, 2, 3, 4\}, if neighboring digits must differ by exactly one?

Proposed by Germany, FR.

Slični zadaci

#NaslovOznakeRj.KvalitetaTežina
1959IMO Shortlist 1997 problem 30
1701IMO Shortlist 1987 problem 170
1686IMO Shortlist 1987 problem 20
1638IMO Shortlist 1984 problem 170
1628IMO Shortlist 1984 problem 70
1390IMO Shortlist 1969 problem 600