Its a nice series of problems and i think there are more than enough untied problems for another Sequence and Series problem group. So maybe Chris its about time to curate one :)
Thanks Nikolaos. I was thinking of making a group on primes, but one on sequences and series is a good idea.
I'm interested to see whether anyone uses my approach to this problem--especially after all of the solvers of my Connell sequence problem (Cody Problem 46615) to this point found the easy way.
Times 2 - START HERE
Project Euler: Problem 3, Largest prime factor
How to subtract?
Create a vector whose elements depend on the previous element
Return 'on' or 'off'
Solve an ODE: diffusion problem 1
Find pairs of primes with the same digit sum
Pass the cards in Fitch Cheney's five-card trick
Solve an ODE: diffusion problem 2
Compute the nth term from the Sieve of Flavius Josephus
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