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 A027456 #10 Jan 20 2024 13:34:17 %S A027456 575,865,39743,19153,3681784,18198125,325151875,226462663, %T A027456 218431158848,163390785768,275577122835000,216187828065000, %U A027456 172736941569984,1121674137386517,4534605234349771581,3776294388104363125,21799582086436073920000,18520810592837638076992 %N A027456 Third diagonal of A027448. %F A027456 Numerators of sequence a[ n, n-2 ] in (a[ i, j ])^4 where a[ i, j ] = 1/i if j<=i, 0 if j>i. %Y A027456 Cf. A027448. %K A027456 nonn %O A027456 3,1 %A A027456 _Olivier Gérard_ %E A027456 More terms from _Sean A. Irvine_, Nov 04 2019