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 A039836 #31 Sep 26 2023 16:42:22 %S A039836 1,2,3,3,4,4,4,5,5,5,5,5,6,6,6,6,6,6,7,7,7,7,7,7,8,8,8,8,8,8,8,8,8,8, %T A039836 9,9,9,9,9,9,9,9,9,9,9,10,10,10,10,10,10,10,10,10,10,10,10,11,11,11, %U A039836 11,11,11,11,11,11,11,11,11,11,11,12,12,12,12,12,12 %N A039836 Maximal number m of integers s(i), with 1 <= s(1) < s(2) < ... < s(m) <= n, such that all sums s(i) + s(j), i<>j, are distinct. %H A039836 Rob Pratt, <a href="/A039836/b039836.txt">Table of n, a(n) for n = 1..110</a> %H A039836 Sean A. Irvine, <a href="https://github.com/archmageirvine/joeis/blob/master/src/irvine/oeis/a039/A039836.java">Java program</a> (github) %H A039836 Manuel Kauers and Christoph Koutschan, <a href="https://arxiv.org/abs/2303.02793">Some D-finite and some Possibly D-finite Sequences in the OEIS</a>, arXiv:2303.02793 [cs.SC], 2023, p. 4. %K A039836 nonn %O A039836 1,2 %A A039836 _John W. Layman_ %E A039836 a(27)-a(63) from _Sean A. Irvine_, Feb 27 2021 %E A039836 Further terms from _Rob Pratt_, May 03 2021