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 A049698 #8 Aug 07 2021 01:54:52 %S A049698 1,4,7,13,17,27,33,45,53,69,77,99,109,129,143,167,181,215,229,259,277, %T A049698 311,329,371,391,429,453,499,519,577,601,651,683,727,755,815,845,905, %U A049698 939,1003,1031,1113,1145,1211,1253,1323,1361,1449,1485,1559,1603,1687 %N A049698 a(n) = T(n,n+2), array T as in A049695. %K A049698 nonn %O A049698 0,2 %A A049698 _Clark Kimberling_ %E A049698 More terms from _Sean A. Irvine_, Aug 06 2021