A226668 Integer k associated with the conjectured record-breaking maximal element A226667(n) of primitive Collatz-like 3x+k cycles.
1, 5, 29, 343, 439, 3437, 3787, 3949, 13033, 28493, 30809, 42887, 178459, 184861, 215663, 227063
Offset: 1
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