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 A117010 #10 Nov 08 2018 10:13:02 %S A117010 0,1,3,5,11,23,29,59,119,179,209,359,419,839,1259,1679,2519,4619,7559, %T A117010 9239,13859,18479,27719,55439,83159,110879,120119,180179,240239, %U A117010 360359,720719,1081079,1441439,1801799,2042039,2882879,3063059,4084079,5405399,6126119 %N A117010 a(n) = A126098(n) - 1. %H A117010 Ray Chandler, <a href="/A117010/b117010.txt">Table of n, a(n) for n = 1..582</a> %Y A117010 Cf. A117677, A117679, A126098. %K A117010 nonn %O A117010 1,3 %A A117010 _N. J. A. Sloane_, Apr 15 2006 %E A117010 Definition revised by _N. J. A. Sloane_ at the suggestion of Ray Chandler, Dec 05 2008