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 A116194 #6 Jul 19 2021 22:58:50 %S A116194 1,2,10,47,550,802,570035,623387,1327222,4041011,8252210, %T A116194 164398539591831062,173868055738777586,339918283297349107, %U A116194 353476744122425611,846974882088186070,868300386379144450 %N A116194 Numbers k such that k concatenated with k+5 gives the product of two numbers which differ by 6. %e A116194 8252210//8252215 = 9084165 * 9084171, where // denotes %e A116194 concatenation. %Y A116194 Cf. A116187, A116193, A116195, A116208, A116325. %K A116194 nonn,base %O A116194 1,2 %A A116194 _Giovanni Resta_, Feb 06 2006