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 A194541 #13 Mar 30 2012 18:55:29 %S A194541 1,5,16,47,130,357,973,2647,7197,19564,53181,144561,392958,1068172, %T A194541 2903593,7892784,21454811,58320223,158530804,430931404,1171393005, %U A194541 3184176320,8655488630,23528057461,63955891057,173850136486,472573666887,1284588411309 %N A194541 Partial sums of A004080. %C A194541 The ratio of a(n) to A004080(n+1) converges to e/(e-1), which is approximately equal to 1.581976706. For example, a(21)/A004080(22) = 1171393005/740461601 = 1.581976706716... %H A194541 Ronald E. Bruck, <a href="http://imperator.usc.edu/~bruck/classes/fall2003/math126/exams/finalsolns.pdf">Maths_Exam_Solns</a> (see page 6). %Y A194541 Cf. A004080. %K A194541 nonn %O A194541 1,2 %A A194541 _Joseph Foley_, Aug 28 2011