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 A156750 #4 Jun 02 2025 01:22:59 %S A156750 1,2,15,243,69282,36600664305,6435072487994269232829, %T A156750 364103502021384610224777078613738432189483892 %N A156750 Greedy Egyptian fraction for Pi/2. %H A156750 Wikipedia, <a href="http://en.wikipedia.org/wiki/Greedy_algorithm_for_Egyptian_fractions">Greedy algorithm for Egyptian fractions</a> %F A156750 Sum(n>=0,1/a(n))=Pi/2 %o A156750 (PARI) x=Pi/2; for (k=0, 7, d=ceil(1/x); x=x-1/d; print(d,", ")) %Y A156750 Cf. A001466, A156269, A156736. %K A156750 nonn %O A156750 0,2 %A A156750 _Jaume Oliver Lafont_, Feb 14 2009