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Strength records in 3x+1 problem.
3

%I #3 Oct 21 2012 11:25:41

%S 0,9,10,17,28,38

%N Strength records in 3x+1 problem.

%H Eric Roosendaal, <a href="http://www.ericr.nl/wondrous/strengths.html">3x + 1 strength records</a>

%Y Cf. A217935, A217936, A217937.

%K nonn,more

%O 1,2

%A _N. J. A. Sloane_, Oct 21 2012