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 A086442 #6 May 15 2021 22:24:37 %S A086442 1,1,2,2,6,6,18,20,50,74,186,216,630,916,2002,3040,7710,10806,27594, %T A086442 40642,94658,158492,364722,516682,1333926,2180772,4770374,7845774, %U A086442 18512790,28706044,69273666,111116576,251853466,436650938,977895330 %N A086442 a(n) = A086323(n)/n. %Y A086442 Cf. A086323. %K A086442 nonn %O A086442 1,3 %A A086442 _Vladeta Jovovic_, Sep 09 2003 %E A086442 More terms from _Max Alekseyev_, Sep 25 2009