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 A117005 #5 Mar 15 2023 11:26:40 %S A117005 1,2,2,2,2,2,2,2,-1,2,2,-4,2,2,-4,2,2,-4,2,2,-4,2,2,-4,-3,2,-4,2,2, %T A117005 -14,2,2,-4,2,-8,-4,2,2,-4,-8,2,-4,2,2,-14,2,2,-4,9,-8,-4,2,2,-4,-8, %U A117005 16,-4,2,2,-14,2,2,10,2,-8,-4,2,2,-4,6,2,-4,2,2,-14,2,16,-4,2,-8,5,2,2,10,-8,2,-4,2,2,4,16,2,-4,2,-8,-4,2,16,14,-8 %N A117005 a(n) = A117000(n) - A117001(n). %D A117005 H. J. S. Smith, Report on the Theory of Numbers, reprinted in Vol. 1 of his Collected Math. Papers, Chelsea, NY, 1979, see p. 322. %Y A117005 Cf. A117000, A117001. %K A117005 sign %O A117005 1,2 %A A117005 _N. J. A. Sloane_, Apr 15 2006