My Math Forum Sequences with a finite number of primes

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 November 15th, 2007, 08:29 PM #11 Member   Joined: Oct 2007 Posts: 68 Thanks: 0 an interesting sequence Lucas term =L(n) L(y)-l(x) V L(y) is prime for terms less than 90 (for a y and some x). not sure if it is finite though. i cant seem to find any that are more than that (i do not have any proofs at all, i came across this incidentally).
November 16th, 2007, 04:50 AM   #12
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Re: i think

Quote:
 Originally Posted by soandos that it was proven that for any given set of points there is a function that will return that result.

Well sure, I mean let's say you have a set S of some pairs of real numbers where the first numbers always differ (otherwise, it wouldn't be a function by the 'vertical line test' or whatever you call it). Define f: R → R by f(x) = y if (x, y) is in S and f(x) = 0 otherwise.

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