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 A374796 #9 Jul 20 2024 15:07:51 %S A374796 1,15,4095,66066 %N A374796 Positive integers that can be written as a Stirling number of the second kind in more than one way. %C A374796 k*(k+1)/2 is a term if k is a term of A215797 and k != 0,2. %C A374796 a(5) > 10^8 (if it exists). %e A374796 With S2(n,k) = A008277(n,k): %e A374796 1 = S2( 1, 1) = S2( 2, 1) (for example); %e A374796 15 = S2( 5, 2) = S2( 6, 5); %e A374796 4095 = S2(13, 2) = S2( 91, 90); %e A374796 66066 = S2(14,11) = S2(364,363). %Y A374796 Cf. A008277, A024412, A215797. %K A374796 nonn,more %O A374796 1,2 %A A374796 _Pontus von Brömssen_, Jul 20 2024