Math Problem Statement
Hỏi có bao nhiêu số có n chữ số với các chữ số nằm trong tập {1,2,3,4,5} mà 2 chữ số liên tiếp hơn kém nhau đúng 1 đơn vị.
Solution
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Math Problem Analysis
Mathematical Concepts
Combinatorics
Recursive Algorithms
Formulas
f(n, x) = f(n-1, x-1) + f(n-1, x+1)
Base case: f(1, x) = 1 for x in {1,2,3,4,5}
Theorems
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Suitable Grade Level
Grades 9-12
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