perplexus.info :: Sequences : Non-trivial solutions

Non-trivial solutions (Posted on 2019-10-16)

3, 7, 11, ...

Please provide next 3 terms, according to some non-trivial (e.g. 15, 19, 23) definition.

No Solution Yet Submitted by Ady TZIDON

Rating: 5.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)

A few ideas

| Comment 1 of 5

3, 7, 11, 19, 31, 51, 83, ...

t(n) = t(n-1) + t(n-2) + 1

3, 7, 11, 12, 2, -40, -169, ...

If f(n) is the nth Fibonacci number then t(n) = (n+2)^2 - f(n)

3, 7, 11, 19, 23, 31, 43, ...

Primes congruent to 3 mod 4

Posted by Brian Smith on 2019-10-17 11:05:42

Please log in:

Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (0)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:


perplexus dot info