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 A024400 #10 Jul 07 2019 02:50:10
%S A024400 33,304,1418,4726,12760,29771,62375,120293,217192,371635,608125,
%T A024400 958252,1461943,2168809,3139601,4447759,6181066,8443406,11356615,
%U A024400 15062445,19724615,25530979,32695782,41462024,52103923,64929482,80283154,98548608
%N A024400 [ (4th elementary symmetric function of S(n))/(first elementary symmetric function of S(n)) ], where S(n) = {first n+3 positive integers congruent to 2 mod 3}.
%F A024400 a(n) = floor(A024393(n) / A005449(n + 3)). - _Sean A. Irvine_, Jul 06 2019
%Y A024400 Cf. A005449, A024393.
%K A024400 nonn
%O A024400 1,1
%A A024400 _Clark Kimberling_