data/problems/178.yml
---
:id: 178
:name: Step Numbers
:url: https://projecteuler.net/problem=178
:content: "\r Consider the number 45656. \nIt can be seen that each pair of consecutive
digits of 45656 has a difference of one. \nA number for which every pair of consecutive
digits has a difference of one is called a step number. \nA pandigital number contains
every decimal digit from 0 to 9 at least once. \nHow many pandigital step numbers
less than 10<sup>40</sup> are there?\n"