cp's OEIS Frontend

A117830 Let S_m be the infinite sequence formed by starting with m and repeatedly reversing the digits and adding 4 to get the next term. For all m < 1015, S_m enters the cycle of length 54 whose terms are shown here.

%I A117830 #14 Jul 17 2015 19:39:55
%S A117830 5,9,13,35,57,79,101,105,505,509,909,913,323,327,727,731,141,145,545,
%T A117830 549,949,953,363,367,767,771,181,185,585,589,989,993,403,308,807,712,
%U A117830 221,126,625,530,39,97,83,42,28,86,72,31,17,75,61,20,6,10,5,9,13,35,57,79,101,105,505,509,909,913,323,327,727,731,141,145
%N A117830 Let S_m be the infinite sequence formed by starting with m and repeatedly reversing the digits and adding 4 to get the next term. For all m < 1015, S_m enters the cycle of length 54 whose terms are shown here.
%C A117830 S_1015 is the first exception: this immediately enters the cycle of length 90 shown in A117807. - _Klaus Brockhaus_, May 05 2006
%C A117830 Except for the initial 1, identical to A117828.
%H A117830 N. J. A. Sloane and others, <a href="/wiki/Sequences_of_RADD_type">Sequences of RADD type</a>, OEIS wiki.
%H A117830 <a href="/index/Rec#order_54">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, 1).
%F A117830 a(n) = A117828(n+1). - _M. F. Hasler_, May 22 2014
%Y A117830 S_1 is given in A117828, S_3 in A117829. See also A117827, A117831, A117807.
%K A117830 nonn,base
%O A117830 1,1
%A A117830 Luc Stevens (lms022(AT)yahoo.com), Apr 06 2006
%E A117830 Edited by _N. J. A. Sloane_, May 05 2006