All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Numbers > Sequences
Non-trivial solutions (Posted on 2019-10-16) Difficulty: 3 of 5
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.)
Hints/Tips 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:
Login:
Password:
Remember me:
Sign up! | Forgot password


Search:
Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (4)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:
Copyright © 2002 - 2020 by Animus Pactum Consulting. All rights reserved. Privacy Information