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 A087837 #4 Oct 19 2017 03:14:23 %S A087837 1017,1074,1269,1771,2145,2255 %N A087837 a(n)*primorial(2749)+1 is prime. %C A087837 The "2749" sequence has rather few small terms. %Y A087837 Cf. A002110, A087730-2, A087832, 3, 5, 7. %K A087837 nonn %O A087837 0,1 %A A087837 _Pierre CAMI_, Oct 07 2003 %E A087837 Edited by _Don Reble_, Nov 09 2005