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 A327919 #8 Oct 18 2019 04:12:29 %S A327919 23,211,223,229,37,311,313,317,331,53,523,73,719,113,1117,1123,1129 %N A327919 The 17 pure prime dates of each leap year of the form concatenate(month,day) with month and day also prime numbers. %C A327919 For the non-leap case see A327918. %C A327919 The months m = 2, 3, 5, 7, 11 contribute 4, 5, 2, 2, 4 days, respectively, adding to 17. %Y A327919 Cf. A165243 (first four terms), A165292 (first five terms), A165555 (first two terms), A167187 (first two terms), A327349 (m and d nonprime allowed), A327915 (with 0 before d = 1..9), A327918 (non-leap year case), A327920 (pure prime dates of d.m form). %K A327919 nonn,easy,fini,full %O A327919 1,1 %A A327919 _Wolfdieter Lang_, Oct 08 2019