This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A118156 #8 Jul 17 2020 16:47:40 %S A118156 1,62,87,139,992,360,124,482,345,604,467,825,589,1046,6462,2707,7133, %T A118156 3378,8794,5039,9366,6700,137,792,358,914,480,145,602,267,823,389, %U A118156 1044,4462,2705,5133,3376,6794,5037,7366,6698,9027,7270,788,948,910,80,69 %N A118156 Start with 1 and repeatedly reverse the digits and add 61 to get the next term. %C A118156 After 78 steps enters a cycle of 36. Cycle : 70, 68, 147, 802, 269, 1023, 3262, 2684, 4923, 3355, 5594, 5016, 6166, 6677, 7827, 7348, 8498, 9009, 9070, 770, 138, 892, 359, 1014, 4262, 2675, 5823, 3346, 6494, 5007, 7066, 6668, 8727, 7339, 9398, 9000,... %H A118156 N. J. A. Sloane and others, <a href="/wiki/Sequences_of_RADD_type">Sequences of RADD type</a>, OEIS wiki. %Y A118156 Cf. A117828, A117816, A117817. %K A118156 base,nonn,less %O A118156 1,2 %A A118156 Luc Stevens (lms022(AT)yahoo.com), May 14 2006 %E A118156 a(37) corrected by _Georg Fischer_, Jul 17 2020