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Mystery sequence (Posted on 2022-10-13) Difficulty: 4 of 5
16, 128, 384, 512, 1024, 1536, 1792, 2176, 2560, 2912, ?, ...

No Solution Yet Submitted by Math Man    
Rating: 5.0000 (1 votes)

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re: Solution? - confirmation | Comment 3 of 8 |
(In reply to Solution? by Jer)

Jer's prescription seemed so arbitrary that I couldn't believe it :-)  So I tested it with odd numbers up to 999 and powers of 2 up to 14. The sorted (ascending) list of numbers that satisfy the prescription is listed below and is in complete agreement with Jer's result.


I imagine there is a way to exclude the possibility of any interloper being added to the list from a greater odd number, but I have stopped here. Program is here


coef    n    2^n    product

---------------------------

  1      4     16        16

  1      7    128       128

  3      7    128       384

  1      9    512       512

  1     10   1024      1024

  3      9    512      1536

  7      8    256      1792

 17      7    128      2176

  5      9    512      2560

 91      5     32      2912

  3     10   1024      3072

  5     10   1024      5120

  7     10   1024      7168

  1     13   8192      8192

  9     10   1024      9216

 11     10   1024     11264

 13     10   1024     13312

 15     10   1024     15360

 61      8    256     15616

  1     14  16384     16384

 17     10   1024     17408

 19     10   1024     19456

 21     10   1024     21504

 23     10   1024     23552

 25     10   1024     25600

 27     10   1024     27648

  7     12   4096     28672

 29     10   1024     29696

 31     10   1024     31744

 33     10   1024     33792

 35     10   1024     35840

 73      9    512     37376

 37     10   1024     37888

 39     10   1024     39936

 41     10   1024     41984

339      7    128     43392

  7     13   8192     57344

 65     10   1024     66560

 11     13   8192     90112

 79     11   2048    161792

 33     13   8192    270336

 97     12   4096    397312

433     10   1024    443392

971      9    512    497152

579     11   2048   1185792

323     12   4096   1323008

955     11   2048   1955840

969     12   4096   3969024

479     14  16384   7847936

Edited on October 13, 2022, 11:42 pm
  Posted by Steven Lord on 2022-10-13 22:36:34

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