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 A027452 #11 Nov 05 2019 00:58:28 %S A027452 7,19,37,549,364,12700,38025,265825,212464,21019824,17507700, %T A027452 2502630900,2144458800,1858077936,6501984489,1657735504425, %U A027452 1473342270400,475835044484800,428209840762704,387395612954064,352152440452800,170078965146417600,155897164961237700 %N A027452 Second diagonal of A027447. %F A027452 Numerators of sequence a(n, n-1) in (a(i, j))^3 where a(i, j) = 1/i if j <= i, 0 if j > i. %K A027452 nonn %O A027452 2,1 %A A027452 _Olivier Gérard_ %E A027452 More terms from _Sean A. Irvine_, Nov 04 2019