Pick a positive integer to start a sequence. Now double it, and add one to the result: this is the second number of your sequence. Double that number, and add one, and that will be your third number; repeat the doubling and adding, and you will have a fourth number, and so on.
If you start with a prime number, and you keep doubling and adding one, is it possible to produce a sequence with only prime numbers?
(In reply to
re: One Approach (Spoiler?) by Bernie Hunt)
Your approach is definitely better than mine, and is probably what the proposer intended.
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Posted by Richard
on 2006-11-29 14:30:37 |
re(2): One Approach (Spoiler?)
