A226682
Integer k associated with the conjectured record-breaking maximal value A226681(n) of the minimal elements of primitive Collatz-like 3x-k cycles.
Original entry on oeis.org
1, 11, 17, 19, 23, 131, 311, 467, 3377, 5137, 66781, 76085, 143369
Offset: 1
A226665
Conjectured record-breaking maximal values, for ascending positive integers k, of the minimal elements of the primitive cycles of positive integers under iteration by the Collatz-like 3x+k function.
Original entry on oeis.org
1, 347, 7055, 177337, 212665, 219913, 379541, 413803, 822535, 1391321, 8013899, 21619279, 21834347, 28306063, 37550317, 168536521, 189763177
Offset: 1
a(1)=1 because {1,2}, with minimal element 1, is the only known '3x+1' cycle of positive integers.
k=5 is the next value of k>1 with GCD(k,6)=1. The minimal element in each of the five known primitive '3x+5' cycles of positive integers is 1, 19, 23, 187 and 347. 347>a(1) so a(2)=347.
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