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A008897 x->x/2 if x even, x->3x-1 if x odd. 0

%I

%S 83,248,124,62,31,92,46,23,68,34,17,50,25,74,37,110,55,164,82,41,122,

%T 61,182,91,272,136,68,34,17,50,25,74,37,110,55,164,82,41,122,61,182,

%U 91,272,136,68,34,17,50,25,74,37

%N x->x/2 if x even, x->3x-1 if x odd.

%C Modified Collatz sequence beginning with 83 and using 3x-1 rather than 3x+1 for odd terms. [From Harvey P. Dale, May 08 2012]

%D R. K. Guy, Unsolved Problems in Number Theory, E16.

%H <a href="/index/Rec#order_18">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1).

%t NestList[If[EvenQ[#],#/2,3#-1]&,83,60] (* _Harvey P. Dale_, May 08 2012 *)

%K nonn

%O 0,1

%A _N. J. A. Sloane_.

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Last modified September 19 07:24 EDT 2020. Contains 337178 sequences. (Running on oeis4.)