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 A275687 #22 Mar 07 2025 07:50:35 %S A275687 0,9561,70495851,465621162291 %N A275687 Difference between the smallest 10^n-digit member of a sexy prime quadruple and 10^(10^n - 1), or 0 if no such 10^n-digit number exists. %F A275687 Conjecture: a(n) = A133449(10^(n-1)) for n >= 1. - _Jason Yuen_, Mar 07 2025 %e A275687 a(0) = 0 because (5, 11, 17, 23, 29) is a sexy prime 5-tuple and this is the only sexy prime 5-tuple. %e A275687 a(1) = 9561 because 10^9+9561 is the smallest 10-digit member of a sexy prime quadruple. The quadruple is (10^9+9561, 10^9+9567, 10^9+9573, 10^9+9579). %Y A275687 Cf. A023201, A023271, A133449. %K A275687 nonn,base,hard,more %O A275687 0,2 %A A275687 _Arkadiusz Wesolowski_, Aug 05 2016