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 A345873 #8 Jul 02 2021 03:34:54 %S A345873 0,1,-1,2,3,-2,-3,-4,6,-5,5,9,4,7,-6,-8,-9,10,11,-7,-12,8,-11,-16,13, %T A345873 -15,-19,-10,12,15,19,-13,20,-20,21,22,14,-17,18,23,16,17,-14,-25,26, %U A345873 -23,27,-29,-28,-27,-26,29,-24,-33,25,33,-18,28,-22,31,-21,-35 %N A345873 a(n) = A345415(A345872(n), A345872(n+1)). %C A345873 All terms are distinct. %H A345873 Rémy Sigrist, <a href="/A345873/b345873.txt">Table of n, a(n) for n = 1..10000</a> %H A345873 Rémy Sigrist, <a href="/A345873/a345873.gp.txt">PARI program for A345873</a> %e A345873 a(3) = A345415(A345872(3), A345872(4)) = A345415(2, 3) = -1. %o A345873 (PARI) See Links section. %Y A345873 Cf. A345415, A345872. %K A345873 sign %O A345873 1,4 %A A345873 _Rémy Sigrist_, Jun 27 2021