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This is my first question in this community, it might be obvious but I haven't found a good answer after searching on Google and Mathematics StackExchange.

What do you call an integer number whose digits are strictly increasing in value from left to right?

E.g.: 1234, 345, 6789, etc...

Based on this question, some people seem to call it a stairstep number, but is there an "official" name for these numbers? I'm looking for something similar to Perfect numbers, Amicable numbers, etc.

Thanks!

Théophile
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adamgy
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    I don't think such numbers are mathematically interesting enough to have warranted a standard name. They're usually just described by the property they have, as you did. on OEIS, for example, they're called "numbers whose decimal digits are in strictly increasing order". – Théophile Oct 23 '20 at 22:58
  • Yeah, that makes sense. I guess they're not that special, but I think many people find them oddly satisfying, and was surprised that I didn't find a Wikipedia article about them. But now that I think about it, they aren't that interesting at all :D – adamgy Oct 23 '20 at 23:18
  • ...just "numbers"? – Saša Oct 24 '20 at 15:34

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