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 A348481 #9 Oct 29 2021 12:30:41
%S A348481 1,1,1,3,1,1,1,5,15,6,12,45,2,65,4,4,4,44,2,392
%N A348481 a(n) is the number of n-element subsets of {1,2,3,...,A347498(n)} with the property that all products i * j are distinct for i <= j.
%e A348481 For n = 8, A347498(n) = 11, and the a(8) = 5 8-element subsets of {1,2,...,11} with distinct pairwise products are
%e A348481 {1,2,5,6,7,8,9,11};
%e A348481 {1,2,6,7,8,9,10,11};
%e A348481 {1,5,6,7,8,9,10,11};
%e A348481 {2,3,5,7,8,9,10,11}; and
%e A348481 {2,5,6,7,8,9,10,11}.
%Y A348481 Cf. A347498, A347499.
%K A348481 nonn,more
%O A348481 1,4
%A A348481 _Peter Kagey_, Oct 20 2021
%E A348481 a(18)-a(20) from _Michael S. Branicky_, Oct 28 2021