Concatenating two consecutive integers 183 and 184
we get a six-digit number 183184, equalling square of 428.
List similar pairs, below 500,000 (final product).

How about the same task with a pair of a consecutve numbers
in a decreasing order?
Please provide a similar list (same constraints).

(In reply to solution ++ by Charlie)

There do appear to be fewer descending, but there is a pattern in the list of descending:  91, 9901, 999001

Posted by Jer on 2021-08-19 11:24:12