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 A308415 #14 Jul 14 2019 14:31:42 %S A308415 3,3,5,5,8,5,10,8,11,8,13,8,15,10,13,12,18,11,19,14,19,13,22,14,22,15, %T A308415 22,18,24,13,25,20,23,18,28,18,25,20,28,22,28,19,29,24,29,20,33,24,35, %U A308415 23,32,27,33,22,42,28,35,24,38,24,30,26,38,31 %N A308415 Number of irreducible Egyptian fractions of denominator n which are the sum of 3 unit fractions. %H A308415 Cyril Banderier, Florian Luca, Francesco Pappalardi, <a href="https://lipn.fr/~cb/Papers/EgyptianFractions.pdf">Numerators of Egyptian fractions</a>, 2019. %e A308415 There are a(2)=3 irreducible fractions with denominator n=2 which are the sums of 3 unit fractions: 1/2 = 1/8 + 1/8 + 1/4 and 3/2 = 1/2 + 1/2 + 1/2, and 5/2 = 1/1 + 1/1 + 1/2. %Y A308415 Cf. A308219, A308220, A308221. %K A308415 nonn %O A308415 1,1 %A A308415 _Cyril Banderier_, May 25 2019