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#27 by OEIS Server at Sat Mar 02 10:35:54 EST 2024
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Zhao Hui Du, <a href="/A053931/b053931_1.txt">Table of n, a(n) for n = 1..18</a>
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#26 by Andrew Howroyd at Sat Mar 02 10:35:54 EST 2024
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Discussion
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| Sat Mar 02
| 10:35
| OEIS Server: Installed first b-file as b053931.txt.
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#25 by Hugo Pfoertner at Sat Mar 02 04:02:01 EST 2024
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#24 by Michel Marcus at Sat Mar 02 02:58:13 EST 2024
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#23 by Michel Marcus at Sat Mar 02 02:58:03 EST 2024
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P. Patrick De Geest, <a href="http://www.worldofnumbers.com/threedigits.htm">Squares containing at most three distinct digits, Index entries for related sequences</a>
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| STATUS
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reviewed
editing
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#22 by Hugo Pfoertner at Sat Mar 02 02:12:03 EST 2024
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#21 by Andrew Howroyd at Fri Mar 01 21:51:29 EST 2024
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Discussion
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| Fri Mar 01
| 21:54
| Andrew Howroyd: It surely takes nearly zero time to check from 1..12 digits. (in my experience, nearly all time in spent getting the final term(s), and checking what is already there is just a good code test and that is done quickly)
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| 22:04
| Zhao Hui Du: Yes. You are right.
To generate an efficient code, some preprocessing is required and my code generates a range of data so that the default configuration is to generate numbers between 17 digits and 27 digits. (The length of upper bound must be less than twice of lower bound).
I have used the data between 17 digits and 23~25 digits to check with existing data to verify the correctness of the data.
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#20 by Andrew Howroyd at Fri Mar 01 21:51:24 EST 2024
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| EXTENSIONS
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a(1814) fromonwards added by Zhao Hui Du, Mar 01 2024
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| STATUS
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proposed
editing
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#19 by Zhao Hui Du at Fri Mar 01 21:50:25 EST 2024
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#18 by Zhao Hui Du at Fri Mar 01 21:47:36 EST 2024
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| LINKS
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Zhao Hui Du, <a href="/A053931/b053931_1.txt">Table of n, a(n) for n = 1..18</a>
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| EXTENSIONS
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a(1518) from Zhao Hui Du, Mar 01 2024
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Discussion
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| Fri Mar 01
| 21:49
| Zhao Hui Du: My code doesn't search for number below 16 digits and I copied them from the webpage ~KC2H-MSM but miss two numbers.
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| 21:50
| Zhao Hui Du: I have changed the code parameters to verify all numbers between 13 digits to 20 digits. Now it should be OK.
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