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 A320310 #9 Oct 26 2018 09:45:33 %S A320310 1,8,23,82,114,416,373,1149,1351,2598,2113,7158,4094,9344,11528,18243, %T A320310 11882,33006,18603,48760,42102,54312,40061,121728,68115,105204,112546, %U A320310 178322,101798,284980,133229,300367,247900,305062,295972,625544,271864,475004,479658,847208 %N A320310 (1/4) * number of ways to select 3 distinct points forming a triangle of unsigned area = n/2 from a square of grid points with side length n. %C A320310 Permutations of the 3 points are not counted separately. %H A320310 Giovanni Resta, <a href="/A320310/b320310.txt">Table of n, a(n) for n = 1..100</a> %Y A320310 Cf. A115004, A320540, A320542, A320544. %K A320310 nonn %O A320310 1,2 %A A320310 _Hugo Pfoertner_, Oct 23 2018 %E A320310 a(35)-a(40) from _Giovanni Resta_, Oct 26 2018