Esthetic numbers: Difference between revisions
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It's much more efficient to generate sequences of digits from a base digit, rather than generating sequential integers and discarding those which are not suitable.
For example, we can generate a directed graph, from one digit to the one or two viable adjacent digits, and then build up a result based on all viable values of the rightmost digit of the current list of partially built candidates:
<lang J>graph=: </./|:0 1,10 10#:(#~ isesthetic)10+i.90
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