perplexus.info :: Numbers : Restricted ternary numbers

Restricted ternary numbers (Posted on 2023-07-24)

Evaluate the quantity of 4-digit numbers such that:
a. Use only 3 digits: 1,2 & 3.
b. None of its neighboring digits differ by 2.

Same question for numbers of 5 and 6 digits- still using only 1,2,3.

Enjoy!

No Solution Yet Submitted by Ady TZIDON

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