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 A117521 Start with 1 and repeatedly reverse the digits and add 2 to get the next term. 11

%I

%S 1,3,5,7,9,11,13,33,35,55,57,77,79,99,101,103,303,305,505,507,707,709,

%T 909,911,121,123,323,325,525,527,727,729,929,931,141,143,343,345,545,

%U 547,747,749,949,951,161,163,363,365,565,567,767,769,969,971,181,183,383,385,585,587,787,789,989,991,201,104,403,306,605,508,807,710,19,93,41,16,63,38,85,60,8,10,3,5,7,9,11,13,33,35,55,57,77,79,99,101,103,303,305,505,507,707

%N Start with 1 and repeatedly reverse the digits and add 2 to get the next term.

%H N. J. A. Sloane and others, <a href="/wiki/Sequences_of_RADD_type">Sequences of RADD type</a>, OEIS wiki.

%H <a href="/index/Rec#order_81">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, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1).

%F After 1 step enters a cycle of length 81.

%Y Cf. A117831, A118514.

%K nonn,base

%O 1,2

%A _N. J. A. Sloane_, following discussions with Luc Stevens, May 04 2006

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Last modified July 27 11:04 EDT 2021. Contains 346304 sequences. (Running on oeis4.)