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Numbers n such that the number of steps needed to reach an integer starting with n-1/4 or n+1/4 and iterating the map x-->x*ceiling(x) is the same.
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%I #6 Mar 30 2012 18:39:17

%S 5,9,21,37,46,49,53,69,85,101,113,117,121,133,137,149,165,174,177,181,

%T 197,213,217,229,241,245,261,265,277,293,302,305,309,313,325,341,357,

%U 369,373,389,393,405,421,430,433,437,441,453,469,485,497,501,517,521

%N Numbers n such that the number of steps needed to reach an integer starting with n-1/4 or n+1/4 and iterating the map x-->x*ceiling(x) is the same.

%Y Cf. A068119.

%K nonn

%O 1,1

%A _Benoit Cloitre_, Apr 13 2003