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 A083819 #7 Aug 23 2014 14:54:26 %S A083819 1,36,27,15,18,11385,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, %T A083819 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, %U A083819 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 %N A083819 a(1) = 1, then the smallest k > 1 such that nk + 1 is the digit reversal of k + 1, or 0 if no such number exists. %e A083819 a(2) = 36: 2*36 + 1 = 73, 37 = 36 + 1. %e A083819 a(5) = 18: 18*5 + 1 = 91, 19 = 18 + 1. %Y A083819 Cf. A083811, A083812, A083813, A083818. %K A083819 base,nonn %O A083819 1,2 %A A083819 _Amarnath Murthy_ and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 08 2003 %E A083819 Corrected and extended by _Ray Chandler_, Jun 23 2003