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 A027184 #8 Oct 24 2019 19:16:07 %S A027184 5,15,21,29,38,47,69,78,95,125,132,159,181,197,236,239,285,335,370, %T A027184 389,395,447,492,509,523,553,575,645,719,797,874,879,895,965,1035, %U A027184 1048,1055,1109,1149,1247,1349,1450,1455,1506,1565,1633,1679,1797,1874,1919,1945,2000 %N A027184 a(n) = (1/2)*(n-th largest even number in array T given by A027170). %F A027184 a(n) = A027183(n) / 2. - _Sean A. Irvine_, Oct 24 2019 %K A027184 nonn %O A027184 1,1 %A A027184 _Clark Kimberling_ %E A027184 Corrected and extended by _Sean A. Irvine_, Oct 24 2019