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 A081938 #10 Oct 05 2018 14:51:58
%S A081938 1,2,3,5,9,44,131,602206,39293339293,98576836066063867589
%N A081938 a(1) = 1, a(n) = smallest palindromic number > a(n-1) of the form k*a(n-1) - 1.
%t A081938 nxt[n_]:=Module[{k=2},While[!PalindromeQ[k*n-1],k++];k*n-1]; Join[{1}, NestList[ nxt,2,8]] (* _Harvey P. Dale_, Oct 05 2018 *)
%Y A081938 Cf. A081939.
%K A081938 base,more,nonn
%O A081938 1,2
%A A081938 _Amarnath Murthy_, Apr 02 2003
%E A081938 a(8) and a(9) from _R. J. Mathar_, Jul 15 2007
%E A081938 a(10) from _Donovan Johnson_, Mar 26 2011