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 A289355 #5 Jul 03 2017 15:31:09 %S A289355 17,19,37,41,73,83,89,97,101,103,109,113,127,137,149,151,163,167,179, %T A289355 181,191,193,197,199,223,227,229,233,239,241,251,257,271,281,293,307, %U A289355 313,337,353,359,379,383,389,397,401,409,419,433,439,443,449,457,467 %N A289355 Complement of A229289. %H A289355 Ray Chandler, <a href="/A289355/b289355.txt">Table of n, a(n) for n = 1..1000</a> %Y A289355 Cf. A229289. %K A289355 nonn %O A289355 1,1 %A A289355 _Ray Chandler_, Jul 03 2017