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.
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Factorions: Numbers that equal the sum of the factorials of their digits
Pandigital Factors (Based on Euler 491)
Count alternating permutations
Count the ways pairs of parentheses can be matched correctly
Solve an ODE: equation A
Compute the fractional derivative
Compute the nth term from the golden sieve
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