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 A027453 #10 Nov 05 2019 00:58:35 %S A027453 85,115,1489,919,30676,89125,609625,479269,46805584,38580444, %T A027453 5467738500,4651663500,4005934416,13944602529,3539108614041, %U A027453 3132881376625,1008229438216000,904461877983664,815945004944784,739827337966704,356490237457224000,326078767183396500 %N A027453 Third diagonal of A027447. %F A027453 Numerators of sequence a(n, n-2) in (a(i, j))^3 where a(i, j) = 1/i if j <= i, 0 if j > i. %K A027453 nonn %O A027453 3,1 %A A027453 _Olivier Gérard_ %E A027453 More terms from _Sean A. Irvine_, Nov 04 2019