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 A097881 #18 Oct 30 2022 15:06:43
%S A097881 2,9,4,3,9,4,2,7
%N A097881 Decimal expansion of the sum from 1 to infinity of fraction sequence with numerator triangular numbers and denominator sum of prime cubes.
%F A097881 Equals Sum_{n>=1} A000217(n)/A098999(n). - _R. J. Mathar_, Dec 07 2014
%e A097881 0.29439427...
%K A097881 more,nonn,cons
%O A097881 0,1
%A A097881 _Pierre CAMI_, Sep 02 2004
%E A097881 Offset corrected by _R. J. Mathar_, May 19 2009