Which generalized gcd recurrences become quasi-periodic?
TheoremDB P12111 · integer sequences
Inferred from the community field; finer classification has not been reviewed.
Problem statement
For the recurrence that adds n+R when the preceding term is coprime to n and otherwise divides by their gcd, do quasi-periodic trajectories occur only for R=,1,2,3, with no quasi-periodic trajectory for any R>=4?
Lean 4
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Progress & source assessment
Source-reported assessment, retrieved 8 September 2026. Frontier Science has not independently reviewed this status.
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