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 A338195 #10 Oct 20 2020 08:32:09 %S A338195 18,20,35,36,40,45,54,56,60,70,72,77,80,84,90,100,104,105,108,110,112, %T A338195 120,126,135,140,143,144,154,160,162,168,170,175,176,180,182,189,198, %U A338195 200,208,209,210,216,220,221,224,225,231,234,240,245,252,260,264,266,270 %N A338195 Numbers k such that 3/k = 1/x + 1/y has a solution with 0 < x < y < k. %o A338195 (PARI) for(k=3,270, forstep(y=k-1,1,-1,my(x=3/k-1/y); if(numerator(x)==1&&1/x<y,print1(k,", ");break))) %Y A338195 Cf. A073101, A337432. %Y A338195 Cf. A004611 (Numbers n such that 3/n cannot be written as the sum of 2 unit fractions). %K A338195 nonn %O A338195 1,1 %A A338195 _Rainer Rosenthal_ and _Hugo Pfoertner_, Oct 15 2020