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Lines of Reasoning (Posted on 2004-09-16) Difficulty: 3 of 5
I recently went on vacation around Europe, I started my trip in Paris, France and stayed for 2 Days,
I then ventured Marseilles, also in France for a further 5 days,
the third portion of the holiday took me to Venice, Italy where I spent 12 days,
I stayed in my penultimate location, Vienna, Austria for 16 days.
The final leg of my trip took me to Sophia, Bulgaria. How long did I stay?

See The Solution Submitted by Juggler    
Rating: 2.3333 (6 votes)

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Some Thoughts re(5): Has anyone noticed... SLOANE'S ENNCYC | Comment 16 of 20 |
(In reply to re(4): Has anyone noticed... by Charlie)

Matches (up to a limit of 30) found for 2 5 12 16 :
[It will take a few minutes to search the table (the second and later lookups are faster)]

ID Number: A084122
Sequence: 1,2,5,12,16,3623,4119,618725,708567,1498739,2762990591
Name: Numbers n such that n times the n-th prime is equal to a palindrome.
Example: The 4119 is in the sequence since the 4119-th prime is 39119 and
4199*39119 = 161131161 is a palindrome
See also: Cf. A084121, A084123.
Adjacent sequences: A084119 A084120 A084121 this_sequence A084123
A084124 A084125
Sequence in context: A085227 A039586 A066267 this_sequence A042143
A042467 A024465
Keywords: base,nonn

Edited on September 20, 2004, 11:19 am
  Posted by Ady TZIDON on 2004-09-20 11:18:02

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