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 A165435 #10 Dec 10 2018 16:43:31 %S A165435 1,1,5,81,4079,507549,127126912,55643064708,38715666455777, %T A165435 40095856807088486,58901884724160709571,118283825763578012358080, %U A165435 315297447553856723754810322,1089117884184737631305395668913,4778248300569771278502378511288513 %N A165435 Number of quad-coverings of a set. %C A165435 Analogous to A165434. See comments and references there. %Y A165435 Row 4 of A188392. %Y A165435 Cf. A165434. %K A165435 nonn %O A165435 0,3 %A A165435 _Doron Zeilberger_, Sep 18 2009